阅读说明：本技术 Ppdu传输方法及装置 (PPDU transmission method and device ) 是由 梁丹丹 淦明 李云波 于 2020-05-27 设计创作，主要内容包括：本申请提供了一种PPDU传输方法及装置,涉及通信技术领域。该方法包括：生成X MHz带宽的PPDU,X＞160；其中,PPDU的部分字段或者全部字段在X MHz带宽上通过旋转因子序列旋转,X MHz带宽包括n个Y MHz,该旋转因子序列包括n个旋转因子,每个Y MHz对应一个旋转因子；并发送该X MHz带宽的PPDU。采用本申请的方案,可以降低大带宽下传输的PPDU的PAPR。(The application provides a PPDU transmission method and device, and relates to the technical field of communication. The method comprises the following steps: generating PPDU with X MHz bandwidth, wherein X is more than 160; wherein, part or all fields of the PPDU are rotated by a twiddle factor sequence on an X MHz bandwidth, the X MHz bandwidth comprises n Y MHz, the twiddle factor sequence comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor; and transmitting the PPDU of the X MHz bandwidth. By adopting the scheme of the application, the PAPR of the PPDU transmitted under the large bandwidth can be reduced.)

1. A PPDU transmission method, the method comprising:

generating a physical layer protocol data unit (PPDU) of a bandwidth of X MHz, wherein X is larger than 160, and part or all fields of the PPDU rotate on the bandwidth of X MHz through a twiddle factor sequence; wherein the X MHz bandwidth comprises n Y MHz, the sequence of twiddle factors comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor;

and sending the PPDU of the X MHz bandwidth.

2. A PPDU transmission method, the method comprising:

receiving a physical layer protocol data unit (PPDU) of XMHz bandwidth, wherein X is larger than 160, and part or all fields of the PPDU rotate through a twiddle factor sequence on the X MHz bandwidth; wherein the X MHz bandwidth comprises n Y MHz, the sequence of twiddle factors comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor;

and performing rotation recovery on the PPDU according to the rotation factor sequence.

3. The method according to claim 1 or 2, wherein the X MHz is any one of: 240MHz and 320 MHz.

4. The method of any one of claims 1-3, wherein one or more of a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signaling field (L-SIG), a repeated legacy signaling field (RL-SIG), a general signaling field (U-SIG), and a very high throughput signaling field (EHT-SIG) included in the PPDU are duplicated over the n Y MHz, and wherein the one or more of the L-STF, L-LTF, L-SIG, U-SIG, and EHT-SIG are rotated by the sequence of twiddle factors.

5. The method according to any one of claims 1-4, wherein Y is 20MHz, and the first four twiddle factors in the sequence of twiddle factors are [ 1-1-1-1 ]; or

The Y is 20MHz, and the first eight twiddle factors in the twiddle factor sequence are [ 1-1-1-11-1-1-1 ].

6. The method according to any one of claims 1-5, wherein X is 320 and the twiddle factor sequence is any one of the following sequences: [ 1-1-1-1 jj-1 j-1-j 1-j-1 j-j ], [ 1-1-11-1-1-1-111-11-1 j ], [ 1-1-1-1 j-11 j j 1-1 j-1-1-11 ], [ 1-1-1-111-1-1-1-11-111 ], [ 1-1-1-1 j-1-j j-j j 1-j ], [ 1-1-1-11-1-1-1-1-1-11-111-1 ], [ 1-1-1-1-1-11- ], and the like, [ 1-1-1-11-1-1-1-1111- ], [ 1-1-1-1-1-1-1111-11-111-1 ], [ 1-1-1-1-1-1-11-111-1 ], [ 1-1-1-11-1-1-1-1111- ], [ 1-1-1-1-1-1111-11-111-1 ], [ 1-1-1-1-1-11-111-1 ], [ 1-1-11-1-1-1-1-1111- ], and 1111- ] [ 1-1-1-1 j 1-1 j-1-j-1-j j j-11 ], [ 1-1-1-11-111-1 ].

7. The method according to any one of claims 1-5, wherein X is 240 and the twiddle factor sequence is any one of the following sequences: 1-1-1-11-111-, [1 j-j-1-1-j-j-1-1-j j 1], [ 1-1111-11-1-1111 ], [ 111-1-11-1111-11 ], [ 1-1-1-1 j 1-j 111-11 ], [ 1-1-1-1111-111-11 ], [ 1111-1-11-1-11 j 1], [ 1-1-1-1-11-111-1 ], [ 11-1 j-1-j j-1-1 j j-j ], [ 1-1-1-1-11-111-1 ], [ 11-1 j-1-1-j j-1 ], [ j j-j ], [ 1-1-1-11-11-11-111-1 ], [ 1- ], and [ 11-1-1 j-j j-1 ], [ j j-j ], [ 1-1- ] [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-11-1-1-1-1111 ], [ 1-1-1-1-11-111-1 ], [ 11-11-11-1-1-1-111 ], [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-1-11-1-1-1-1111 ], [ 1-1-1-1-11-111-1 ], [ 11-11-11-1-1-1-1-1-111 ], [ 11-11-11-1-1-1-111 ], [ 1-1-1-1-1-111 ], [ 1-11-11-1-1-1-111 ], [ 1-1-1 ] and, [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-1-1-1-1111 ], [ 1-1-1-1-1-11-111-1 ], [1 j-1-j j 1j 1j 1-j-1 ], [ 1-1-11-1-1-1 j-1-11 ], [ 1-1-1-11-1-1-1-1-1111 ], [ 1-1-1-11-1-1-1111 ].

8. A PPDU transmission apparatus, characterized in that the apparatus comprises:

a generating unit, configured to generate a physical layer protocol data unit PPDU with an X MHz bandwidth, where X is greater than 160, and a part of or all fields of the PPDU are rotated by a twiddle factor sequence on the X MHz bandwidth; wherein the X MHz bandwidth comprises n Y MHz, the sequence of twiddle factors comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor;

and the sending unit is used for sending the PPDU of the X MHz bandwidth.

9. A PPDU transmission apparatus, characterized in that the apparatus comprises:

a receiving unit, configured to receive a physical layer protocol data unit PPDU with an XMHz bandwidth, where X is greater than 160, and a part of or all fields of the PPDU are rotated by a twiddle factor sequence on the X MHz bandwidth; wherein the X MHz bandwidth comprises n Y MHz, the sequence of twiddle factors comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor;

and the processing unit is used for performing rotation recovery on the PPDU according to the rotation factor sequence.

10. The method according to claim 8 or 9, wherein the X MHz is any one of: 240MHz and 320 MHz.

11. The method of any one of claims 8-10, wherein one or more of a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signaling field (L-SIG), a repeated legacy signaling field (RL-SIG), a general signaling field (U-SIG), and a very high throughput signaling field (EHT-SIG) included in the PPDU are duplicated over the n Y MHz, and wherein the one or more of the L-STF, L-LTF, L-SIG, U-SIG, and EHT-SIG are rotated by the sequence of rotation factors.

12. The method according to any one of claims 8-11, wherein Y is 20MHz, and the first four twiddle factors in the sequence of twiddle factors are [ 1-1-1-1 ]; or

The Y is 20MHz, and the first eight twiddle factors in the twiddle factor sequence are [ 1-1-1-11-1-1-1 ].

13. The method according to any one of claims 8-12, wherein X is 320 and the twiddle factor sequence is any one of the following sequences: [ 1-1-1-1 jj-1 j-1-j 1-j-1 j-j ], [ 1-1-11-1-1-1-111-11-1 j ], [ 1-1-1-1 j-11 j j 1-1 j-1-1-11 ], [ 1-1-1-111-1-1-1-11-111 ], [ 1-1-1-1 j-1-j j-j j 1-j ], [ 1-1-1-11-1-1-1-1-1-11-111-1 ], [ 1-1-1-1-1-11- ], and the like, [ 1-1-1-11-1-1-1-1111- ], [ 1-1-1-1-1-1-1111-11-111-1 ], [ 1-1-1-1-1-1-11-111-1 ], [ 1-1-1-11-1-1-1-1111- ], [ 1-1-1-1-1-1111-11-111-1 ], [ 1-1-1-1-1-11-111-1 ], [ 1-1-11-1-1-1-1-1111- ], and 1111- ] [ 1-1-1-1 j 1-1 j-1-j-1-j j j-11 ], [ 1-1-1-11-111-1 ].

14. The method according to any one of claims 8-12, wherein X is 240 and the twiddle factor sequence is any one of the following sequences: 1-1-1-11-111-, [1 j-j-1-1-j-j-1-1-j j 1], [ 1-1111-11-1-1111 ], [ 111-1-11-1111-11 ], [ 1-1-1-1 j 1-j 111-11 ], [ 1-1-1-1111-111-11 ], [ 1111-1-11-1-11 j 1], [ 1-1-1-1-11-111-1 ], [ 11-1 j-1-j j-1-1 j j-j ], [ 1-1-1-1-11-111-1 ], [ 11-1 j-1-1-j j-1 ], [ j j-j ], [ 1-1-1-11-11-11-111-1 ], [ 1- ], and [ 11-1-1 j-j j-1 ], [ j j-j ], [ 1-1- ] [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-11-1-1-1-1111 ], [ 1-1-1-1-11-111-1 ], [ 11-11-11-1-1-1-111 ], [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-1-11-1-1-1-1111 ], [ 1-1-1-1-11-111-1 ], [ 11-11-11-1-1-1-1-1-111 ], [ 11-11-11-1-1-1-111 ], [ 1-1-1-1-1-111 ], [ 1-11-11-1-1-1-111 ], [ 1-1-1 ] and, [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-1-1-1-1111 ], [ 1-1-1-1-1-11-111-1 ], [1 j-1-j j 1j 1j 1-j-1 ], [ 1-1-11-1-1-1 j-1-11 ], [ 1-1-1-11-1-1-1-1-1111 ], [ 1-1-1-11-1-1-1111 ].

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a Physical Protocol Data Unit (PPDU) transmission method and a device.

Background

Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technique, which has the advantages of high spectrum efficiency and multipath fading resistance, but also has the disadvantage of large peak to average power ratio (PAPR). The summation of multiple subcarriers in OFDM results in a large peak signal, and therefore requires a large linear dynamic range for the high power amplifier, which increases the cost of the high power amplifier and reduces the efficiency of the high power amplifier. If the peak value exceeds the linear dynamic range of the high-power amplifier, in-band distortion and out-of-band dispersion can be caused, so that the reduction of the PAPR is a key technology of the OFDM system and has important significance.

With the rapid development of wireless communication technology, the newly introduced 6GHz of the wireless communication protocol 802.11ax may support a bandwidth larger than 160MHz, and for the larger bandwidth, the PAPR problem is more serious, and how to reduce the PAPR under the larger bandwidth is an urgent problem to be solved.

Disclosure of Invention

Embodiments of the present application provide a PPDU transmission method and apparatus, which are used for reducing a PAPR for transmitting a PPDU under a large bandwidth.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a PPDU transmission method is provided, where the method includes: generating a physical layer protocol data unit PPDU with X MHz bandwidth, wherein X is more than 160; part or all of the fields of the PPDU are rotated by a twiddle factor sequence on the X MHz bandwidth; the X MHz bandwidth comprises n Y MHz, the twiddle factor sequence comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor; and transmitting the PPDU of the X MHz bandwidth. Part or all of the fields of the PPDU are rotated by a twiddle factor sequence over the X MHz bandwidth, which may also be: each of a part of or all of the fields of the PPDU is rotated by a twiddle factor sequence at n Y MHz. In the above technical solution, a PPDU with a bandwidth greater than 160MHz may be generated, and a part of or all of fields of the PPDU are rotated by a twiddle factor sequence on an X MHz bandwidth, and a PAPR of the part of or all of fields of the PPDU under a large bandwidth may be reduced by a specific twiddle factor sequence.

In a second aspect, a PPDU transmission method is provided, which includes: receiving a physical layer protocol data unit (PPDU) of XMHz bandwidth, wherein X is larger than 160, and part or all fields of the PPDU rotate through a twiddle factor sequence on the X MHz bandwidth; wherein the X MHz bandwidth comprises n Y MHz, the sequence of twiddle factors comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor; and performing rotation recovery on the PPDU according to the rotation factor sequence.

With reference to the first aspect or the second aspect, in a possible implementation manner, the X MHz is any one of: 240MHz and 320 MHz. In the above possible implementation, several bandwidths greater than 160MHz are provided, so that diversity of the large bandwidth is improved, and further, when PPDU transmission is performed through the large bandwidth, the rate of PPDU transmission can be achieved.

With reference to the first aspect or the second aspect, in a possible implementation manner, the PPDU includes one or more fields of a legacy short training field L-STF, a legacy long training field L-LTF, a legacy signaling field L-SIG, a repeated legacy signaling field RL-SIG, a general signaling field U-SIG, and a very high throughput signaling field EHT-SIG, which are duplicated over the n Y MHz, and the one or more fields of the L-STF, the L-LTF, the L-SIG, the U-SIG, and the EHT-SIG are rotated by the sequence of rotation factors. In the possible implementation manner, by rotating one or more fields in L-STF, L-LTF, L-SIG, RL-SIG, U-SIG and EHT-SIG in the PPDU, the PAPR of the traditional preamble in the PPDU during duplicate transmission can be reduced.

With reference to the first or second aspect, in one possible implementation manner, Y is 20MHz, and the first four twiddle factors in the twiddle factor sequence are [ 1-1-1-1 ]; or said Y is 20MHz, the first eight twiddle factors in said sequence of twiddle factors being [ 1-1-1-11-1-1-1 ]. In the above possible implementation manner, the twiddle factor of the large bandwidth may include a twiddle factor of a set 80MHz bandwidth or a twiddle factor of a set 160MHz bandwidth, which improves the efficiency of acquiring the twiddle factor sequence.

With reference to the first aspect or the second aspect, in one possible implementation manner, X is 320, and the twiddle factor sequence is any one of the following sequences: [ 1-1-1-1 jj-1 j-1-j 1-j-1 j-j ], [ 1-1-11-1-1-1-111-11-1 j ], [ 1-1-1-1 j-11 j j 1-1 j-1-1-11 ], [ 1-1-1-111-1-1-1-11-111 ], [ 1-1-1-1 j-1-j j-j j 1-j ], [ 1-1-1-11-1-1-1-1-1-11-111-1 ], [ 1-1-1-1-1-11- ], and the like, [ 1-1-1-11-1-1-1-1111- ], [ 1-1-1-1-1-1-1111-11-111-1 ], [ 1-1-1-1-1-1-11-111-1 ], [ 1-1-1-11-1-1-1-1111- ], [ 1-1-1-1-1-1111-11-111-1 ], [ 1-1-1-1-1-11-111-1 ], [ 1-1-11-1-1-1-1-1111- ], and 1111- ] [ 1-1-1-1 j 1-1 j-1-j-1-j j j-11 ], [ 1-1-1-11-111-1 ]. In the possible implementation manner, when the PPDU is transmitted through the 320MHz bandwidth, the PAPR of the PPDU under the 320MHz bandwidth can be optimized by using the above sequence of twiddle factors.

With reference to the first aspect or the second aspect, in one possible implementation manner, X is 240, and the twiddle factor sequence is any one of the following sequences: 1-1-1-11-111-, [1 j-j-1-1-j-j-1-1-j j 1], [ 1-1111-11-1-1111 ], [ 111-1-11-1111-11 ], [ 1-1-1-1 j 1-j 111-11 ], [ 1-1-1-1111-111-11 ], [ 1111-1-11-1-11 j 1], [ 1-1-1-1-11-111-1 ], [ 11-1 j-1-j j-1-1 j j-j ], [ 1-1-1-1-11-111-1 ], [ 11-1 j-1-1-j j-1 ], [ j j-j ], [ 1-1-1-11-11-11-111-1 ], [ 1- ], and [ 11-1-1 j-j j-1 ], [ j j-j ], [ 1-1- ] [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-11-1-1-1-1111 ], [ 1-1-1-1-11-111-1 ], [ 11-11-11-1-1-1-111 ], [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-1-11-1-1-1-1111 ], [ 1-1-1-1-11-111-1 ], [ 11-11-11-1-1-1-1-1-111 ], [ 11-11-11-1-1-1-111 ], [ 1-1-1-1-1-111 ], [ 1-11-11-1-1-1-111 ], [ 1-1-1 ] and, [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-1-1-1-1111 ], [ 1-1-1-1-1-11-111-1 ], [1 j-1-j j 1j 1j 1-j-1 ], [ 1-1-11-1-1-1 j-1-11 ], [ 1-1-1-11-1-1-1-1-1111 ], [ 1-1-1-11-1-1-1111 ]. In the possible implementation manner, when the PPDU is transmitted through the 240MHz bandwidth, the PAPR of the PPDU under the 240MHz bandwidth may be optimized by using the rotation factor.

In a third aspect, a PPDU transmission apparatus is provided, which includes: the generating unit is used for generating a physical layer protocol data unit PPDU with X MHz bandwidth, and X is more than 160; rotating part of or all fields of the PPDU on an X MHz bandwidth through a twiddle factor sequence, wherein the X MHz bandwidth comprises n Y MHz, the twiddle factor sequence comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor; and the sending unit is used for sending the PPDU with the X MHz bandwidth.

In a fourth aspect, there is provided a PPDU transmission apparatus, comprising: a receiving unit, configured to receive a physical layer protocol data unit PPDU with an XMHz bandwidth, where X is greater than 160, and a part of or all fields of the PPDU are rotated by a twiddle factor sequence on the X MHz bandwidth; wherein the X MHz bandwidth comprises n Y MHz, the sequence of twiddle factors comprises n twiddle factors, and each Y MHz corresponds to one twiddle factor; and the processing unit is used for performing rotation recovery on the PPDU according to the rotation factor sequence.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the X MHz is any one of: 240MHz and 320 MHz. In the above possible implementation, several bandwidths greater than 160MHz are provided, so that diversity of the large bandwidth is improved, and further, when PPDU transmission is performed through the large bandwidth, the rate of PPDU transmission can be achieved.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the PPDU includes one or more fields of a legacy short training field L-STF, a legacy long training field L-LTF, a legacy signaling field L-SIG, a repeated legacy signaling field RL-SIG, a general signaling field U-SIG, and a very high throughput signaling field EHT-SIG, which are duplicated over the n Y MHz, and the one or more fields of the L-STF, L-LTF, L-SIG, U-SIG, and EHT-SIG are rotated by the sequence of rotation factors. In the possible implementation manner, by rotating one or more fields in L-STF, L-LTF, L-SIG, RL-SIG, U-SIG and EHT-SIG in the PPDU, the PAPR of the traditional preamble in the PPDU during duplicate transmission can be reduced.

With reference to the third or fourth aspect, in one possible implementation manner, Y is 20MHz, and the first four twiddle factors in the twiddle factor sequence are [ 1-1-1-1 ]; or said Y is 20MHz, the first eight twiddle factors in said sequence of twiddle factors being [ 1-1-1-11-1-1-1 ]. In the above possible implementation manner, the twiddle factor of the large bandwidth may include a twiddle factor of a set 80MHz bandwidth or a twiddle factor of a set 160MHz bandwidth, which improves the efficiency of acquiring the twiddle factor sequence.

With reference to the third aspect or the fourth aspect, in one possible implementation manner, X is 320, and the twiddle factor sequence is any one of the following sequences: [ 1-1-1-1 jj-1 j-1-j 1-j-1 j-j ], [ 1-1-11-1-1-1-111-11-1 j ], [ 1-1-1-1 j-11 j j 1-1 j-1-1-11 ], [ 1-1-1-111-1-1-1-11-111 ], [ 1-1-1-1 j-1-j j-j j 1-j ], [ 1-1-1-11-1-1-1-1-1-11-111-1 ], [ 1-1-1-1-1-11- ], and the like, [ 1-1-1-11-1-1-1-1111- ], [ 1-1-1-1-1-1-1111-11-111-1 ], [ 1-1-1-1-1-1-11-111-1 ], [ 1-1-1-11-1-1-1-1111- ], [ 1-1-1-1-1-1111-11-111-1 ], [ 1-1-1-1-1-11-111-1 ], [ 1-1-11-1-1-1-1-1111- ], and 1111- ] [ 1-1-1-1 j 1-1 j-1-j-1-j j j-11 ], [ 1-1-1-11-111-1 ]. In the possible implementation manner, when the PPDU is transmitted through the 320MHz bandwidth, the PAPR of the PPDU under the 320MHz bandwidth can be optimized by using the above sequence of twiddle factors.

With reference to the third aspect or the fourth aspect, in one possible implementation manner, X is 240, and the twiddle factor sequence is any one of the following sequences: 1-1-1-11-111-, [1 j-j-1-1-j-j-1-1-j j 1], [ 1-1111-11-1-1111 ], [ 111-1-11-1111-11 ], [ 1-1-1-1 j 1-j 111-11 ], [ 1-1-1-1111-111-11 ], [ 1111-1-11-1-11 j 1], [ 1-1-1-1-11-111-1 ], [ 11-1 j-1-j j-1-1 j j-j ], [ 1-1-1-1-11-111-1 ], [ 11-1 j-1-1-j j-1 ], [ j j-j ], [ 1-1-1-11-11-11-111-1 ], [ 1- ], and [ 11-1-1 j-j j-1 ], [ j j-j ], [ 1-1- ] [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-11-1-1-1-1111 ], [ 1-1-1-1-11-111-1 ], [ 11-11-11-1-1-1-111 ], [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-1-11-1-1-1-1111 ], [ 1-1-1-1-11-111-1 ], [ 11-11-11-1-1-1-1-1-111 ], [ 11-11-11-1-1-1-111 ], [ 1-1-1-1-1-111 ], [ 1-11-11-1-1-1-111 ], [ 1-1-1 ] and, [ 1-1-1-11-1-1-1 j-1-11 ], [ 1-1-1-1-1-1111 ], [ 1-1-1-1-1-11-111-1 ], [1 j-1-j j 1j 1j 1-j-1 ], [ 1-1-11-1-1-1 j-1-11 ], [ 1-1-1-11-1-1-1-1-1111 ], [ 1-1-1-11-1-1-1111 ]. In the possible implementation manner, when the PPDU is transmitted through the 240MHz bandwidth, the PAPR of the PPDU under the 240MHz bandwidth may be optimized by using the rotation factor.

In a fifth aspect, a PPDU transmission apparatus is provided.

In one possible implementation, the PPDU transmission apparatus may be an information transmission device, the PPDU transmission apparatus including a processor and a transceiver; the processor is configured to control and manage actions of the PPDU transmission apparatus, for example, to support the PPDU transmission apparatus to perform a step of generating a physical layer protocol data unit PPDU with an X MHz bandwidth, and/or to perform other technical processes described herein; and the transceiver is used for supporting the PPDU transmission device to transmit the PPDU with the X MHz bandwidth. Optionally, the PPDU transmission apparatus may further include a memory.

In yet another possible implementation, the PPDU transmission apparatus may be an information transmission board, where the PPDU transmission apparatus includes a processor and a transceiver, and the processor is configured to control and manage actions of the PPDU transmission apparatus, for example, to support the PPDU transmission apparatus to perform a step of generating a physical layer protocol data unit PPDU with an X MHz bandwidth, and/or to use in other technical processes described herein; and the transceiver is used for supporting the PPDU transmission device to transmit the PPDU with the X MHz bandwidth. Optionally, the PPDU transmission apparatus may further include a memory.

In yet another possible implementation, the PPDU transmission means is also implemented by a general purpose processor, commonly referred to as a chip. The general purpose processor includes: the processing circuit is used for generating a physical layer protocol data unit (PPDU) with an X MHz bandwidth; and the communication interface is used for sending the PPDU with the X MHz bandwidth.

The general-purpose processor may also optionally include a storage medium. The processing circuit communicates with the outside using the communication interface. The communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit, etc. on the chip or system of chips. The processor may also be embodied as a processing circuit or a logic circuit. The storage medium is used for storing program codes, the communication interface is used for supporting the PPDU transmission device to carry out communication, and when the program codes are executed by the processor, the program codes are used for generating a physical layer protocol data unit PPDU with X MHz bandwidth; and controlling the communication interface to send the PPDU of the X MHz bandwidth.

In yet another possible implementation, the PPDU transmission means may also be implemented using the following: one or more FPGAs, PLDs, controllers, state machines, gated logic, discrete hardware components, any other suitable circuitry, or any combination of circuitry capable of performing the various functions described throughout this application.

In a sixth aspect, a PPDU transmission apparatus is provided.

In one possible implementation, the PPDU transmission apparatus may be an information transmission device, the PPDU transmission apparatus including a processor and a transceiver; the transceiver is used for supporting the PPDU transmission device to execute the step of receiving the PPDU with the X MHz bandwidth; the processor is configured to control and manage actions of a PPDU transmission apparatus, for example, to support the PPDU transmission apparatus to perform rotation recovery of the PPDU according to the rotation factor sequence, and/or to perform other technical processes described herein. Optionally, the PPDU transmission apparatus may further include a memory.

In yet another possible implementation, the PPDU transmission apparatus may be an information transmission board, where the PPDU transmission apparatus includes a processor and a transceiver, where the transceiver is configured to support the PPDU transmission apparatus to perform a step of receiving a PPDU with an X MHz bandwidth, and the processor is configured to control and manage actions of the PPDU transmission apparatus, for example, to support the PPDU transmission apparatus to perform a step of performing rotation recovery on the PPDU according to the rotation factor sequence, and/or to be used in other technical processes described herein. Optionally, the PPDU transmission apparatus may further include a memory.

In yet another possible implementation, the PPDU transmission means is also implemented by a general purpose processor, commonly referred to as a chip. The general purpose processor includes: a processing circuit and a communication interface; the communication interface is used for receiving a PPDU with a bandwidth of X MHz, and the processing circuit is used for performing rotation recovery on the PPDU according to the rotation factor sequence. The general-purpose processor may also optionally include a storage medium.

The processing circuit communicates with the outside using the communication interface. The communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit, etc. on the chip or system of chips. The processor may also be embodied as a processing circuit or a logic circuit. A storage medium for storing program code, a communication interface for supporting communication by the PPDU transmission apparatus, the program code, when executed by a processor, for performing rotation recovery on the PPDU in accordance with the rotation factor sequence; and controlling the communication interface to receive the PPDU of the X MHz bandwidth.

In yet another possible implementation, the PPDU transmission means may also be implemented using the following: one or more FPGAs, PLDs, controllers, state machines, gated logic, discrete hardware components, any other suitable circuitry, or any combination of circuitry capable of performing the various functions described throughout this application. In a seventh aspect, a computer-readable storage medium is provided, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer is caused to execute the PPDU transmission method provided in the first aspect, the second aspect, or any possible implementation manner of the first aspect and the second aspect.

In an eighth aspect, a computer program product containing instructions is provided, which when run on a computer causes the computer to execute the PPDU transmission method provided in the first aspect, the second aspect, or any possible implementation manner of the first aspect and the second aspect.

It is understood that the apparatus, the computer storage medium, or the computer program product of any PPDU transmission method provided above are all configured to execute the corresponding method provided above, and therefore, the beneficial effects achieved by the apparatus, the computer storage medium, or the computer program product may refer to the beneficial effects in the corresponding method provided above, and are not described herein again.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of a frame structure of a PPDU according to an embodiment of the present application;

fig. 3 is a flowchart illustrating a PPDU transmission method according to an embodiment of the present application;

FIG. 4 is a diagram of a 320MHz PPDU according to an embodiment of the present application;

fig. 5 is a diagram illustrating PPDU transmission at 80MHz according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a PPDU transmission device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another PPDU transmission apparatus according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another PPDU transmission apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another PPDU transmission apparatus according to an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be understood that the embodiments of the present application may be applied to various communication systems, such as: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a long term evolution (long term evolution, LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD) system, a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a 5G communication system, a future 6G communication system, and the like.

It should also be understood that the embodiments of the present application may also be applied to various communication systems based on non-orthogonal multiple access technologies, such as Sparse Code Multiple Access (SCMA) systems, although SCMA may also be referred to by other names in the field of communications; further, the technical solution of the embodiment of the present application may be applied to a multi-carrier transmission system using a non-orthogonal multiple access technology, for example, an Orthogonal Frequency Division Multiplexing (OFDM) system using a non-orthogonal multiple access technology, a filter bank multi-carrier (FBMC), a General Frequency Division Multiplexing (GFDM) system, a filtered orthogonal frequency division multiplexing (F-OFDM) system, and the like.

It should also be understood that the embodiments of the present application may be applied to an LTE system, a 5G system, and a subsequent evolution system, such as 6G, or other wireless communication systems using various wireless access technologies, such as systems using access technologies of code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, single carrier frequency division multiple access, and the like, and are particularly applicable to a scenario that requires channel information feedback and/or applies a secondary precoding technology, for example, a wireless network using a Massive MIMO technology, a wireless network using a distributed antenna technology, and the like.

It should also be understood that the embodiments of the present application are applicable to WiFi wireless communication, and a WiFi wireless communication system includes an Access Point (AP) and a Station (STA), which may also be referred to as a station. The wireless communication scenario involved may include: communication between the AP and the STA, communication between the AP and the AP, communication between the STA and the STA, and the like. In the embodiment of the present application, communication between an AP and an STA is taken as an example for explanation, and as shown in fig. 1, wireless communication is performed between the AP and STAs 1 and 2; it should be understood that the method described in the embodiments of the present application is also applicable to communication between an AP and an AP, communication between a STA and a STA, and the like.

The AP and the STA in the embodiment of the present application may structurally include: a Medium Access Control (MAC) layer and a Physical (PHY) layer. The AP and the STA may perform PPDU transmission through a physical layer Protocol Data Unit (PPDU), and when the AP and the STA use different wireless communication protocols, frame structures of the PPDUs may also be different.

For example, when the wireless communication protocol used by the AP and the STA is 802.11be, the frame structure of the PPDU includes a legacy-short-training-sequence (L-STF) field, a legacy-long-training-sequence (L-LTF) field, a legacy-signaling (L-SIG) field, a repeated legacy-signaling (RL-SIG) field, a universal signaling field symbol 1(universal signaling field symbol 1, U-SIG SYM1), a universal signaling field symbol 2(universal signaling field symbol 2, U-SYM 2), an ultra-high throughput (ultra-high throughput-signaling) field, an EHT-SIG field, and an ultra-high throughput (ultra-high-throughput-signaling) field as shown in fig. 2, An extra high throughput long training sequence field (EHT-LTF) and a data field (data). It should be noted that the L-STF, L-LTF, and L-SIG in the above fields may be referred to as a legacy preamble. The U-SIG SYM1 and U-SG SYM2 may specifically include a version-independent field, a version-dependent information field, a cyclic redundancy code, and a tail. The EHT-SIG may specifically include an EHT-SIG common field and an EHT-SIG user specific field.

It should be noted that, the above description only takes the frame structure of the PPDU in 802.11n, 802.11ac, 802.11ax and 802.11be as an example, the PPDU in the embodiment of the present application is mainly directed to the next generation WiFi PPDU with an ultra-large bandwidth, and the frame structure of the PPDU is not limited to the embodiment of the present application.

Fig. 3 is a flowchart illustrating a PPDU transmission method according to an embodiment of the present application, and referring to fig. 3, the method includes the following steps.

Step S301: the sending end equipment generates a physical layer protocol data unit PPDU with X MHz bandwidth, wherein X is larger than 160; wherein part or all of the fields of the PPDU are rotated by the twiddle factor sequence on the X MHz bandwidth; wherein the X MHz bandwidth includes n Y MHz, the sequence of twiddle factors includes n twiddle factors, and each Y MHz corresponds to one twiddle factor.

When the sending end device is an AP, the AP may perform PPDU transmission with other APs or STAs through a PPDU of an X MHz bandwidth; when the sending end device is an STA, the STA may perform PPDU transmission with an AP or other STAs through a PPDU of an X MHz bandwidth.

In addition, the bandwidth of the X MHz is greater than 160MHz, for example, the X MHz may be 180MHz, 200MHz, 240MHz, 280MHz, 300MHz, or 320MHz, and the like, which is not specifically limited in this embodiment. The Y MHz may be 20MHz, 10MHz, 5MHz, or 2MHz, and the like, which is not specifically limited in the embodiment of the present application. The value range of each of the n twiddle factors included in the twiddle factor sequence can be 1, -1, j or-j, wherein the rotation angle corresponding to the twiddle factor 1 is 0 degree, the rotation angle corresponding to the twiddle factor-1 is 180 degrees, the rotation angle corresponding to the twiddle factor j is 90 degrees, and the rotation angle corresponding to the twiddle factor-j is-90 degrees.

Also, the PPDU may include a plurality of fields, for example, the PPDU may include the fields shown in fig. 2. Part or all of the fields of the PPDU are rotated by a sequence of twiddle factors over the X MHz bandwidth, which may include: partial fields of the PPDU are rotated by a sequence of twiddle factors over the X MHz bandwidth, and fields other than the partial fields are not rotated over the X MHz bandwidth; alternatively, all fields of the PPDU are rotated by a sequence of twiddle factors over the X MHz bandwidth.

Alternatively, part or all of the fields of the PPDU are rotated by a sequence of twiddle factors over the X MHz bandwidth, which can be understood as: each of a portion of or all of the fields of the PPDU is rotated by a sequence of twiddle factors over an X MHz bandwidth. Specifically, each field is rotated on n Y MHz according to a sequence of n long twiddle factors; the twiddle factor sequence comprises n twiddle factors, the X MHz bandwidth comprises n Y MHz, and 1 twiddle factor corresponds to 1Y MHz. For example, X is 320MHz, Y is 20MHz, and n is 16, i.e., 320MHz includes 16 20 MHz; the twiddle factor sequence includes 16 twiddle factors, and the 16 twiddle factors correspond to 16 20MHz one-to-one.

The PPDU of X MHz includes a plurality of fields in a time domain and n Y MHz in a frequency domain, and each field in the time domain corresponds to n Y MHz in the frequency domain. For the n Y MHz corresponding to each field, all of the n Y MHz may carry the field (i.e., the n Y MHz corresponding to the field is full), or there may be a blank Y MHz not carrying the field in the n Y MHz, but the other fields do not occupy the blank Y MHz. The blank Y MHz is caused by the fact that the channel is busy, or the supported part of the frequency band (e.g. 5GHz and 6GHz) is occupied by other systems, such as military radar system and weather radar system, which results in the discontinuous available frequency band when the Wi-Fi system occupies a very large bandwidth. The Y MHz is blank and can be considered punctured.

In addition, when there is a blank Y MHz in n Y MHz corresponding to a certain field in the PPDU, a twiddle factor corresponding to the blank Y MHz is not used when the field is rotated by the twiddle factor sequence.

For example, taking the frame structure of the PPDU shown in fig. 2 as an example, each of the fields L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG in the PPDU may be rotated by a sequence of twiddle factors over n Y MHz, and each of the fields EHT-STF, EHT-LTF, and Data may not be rotated by a sequence of twiddle factors over n Y MHz; alternatively, each of all of the fields shown in FIG. 2 (i.e., the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, EHT-STF, EHT-LTF, and data fields) is rotated by a sequence of twiddle factors over n Y MHz.

In addition, a part of fields of the PPDU may be transmitted in a duplicate rotation transmission mode on n Y MHz, and the part of fields may include L-STF, L-LTF, L-SIG, RL-SIG, U-SIG and EHT-SIG. By replica spin transfer is meant that the content of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG and EHT-SIG transferred at each Y MHz is the same, with the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG and EHT-SIG being rotated by an angle at the different Y MHz.

For the sake of understanding, the frame structure of the PPDU shown in fig. 2 is taken as an example, and a field of the duplicated rotation transmission and a field of the non-duplicated rotation transmission in the PPDU of the X MHz bandwidth are illustrated. Assuming that X and Y are 20, the transmission manner of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields in the PPDU is a duplicate rotation transmission, and the transmission manner of the EHT-STF, EHT-LTF, and data fields in the PPDU is a non-duplicate rotation transmission, a PPDU with a bandwidth of 320MHz may be as shown in fig. 4.

The PPDU may be an OFDMA PPDU or a non-OFDMA PPDU. It should be noted that fields included in the next-generation PPDU do not limit the embodiments of the present application.

Specifically, when the wireless communication device generates the PPDU with the X MHz bandwidth, for part or all fields in the PPDU, multiplying the frequency domain signal corresponding to the part or all fields carried on each Y MHz by the twiddle factor corresponding to the Y MHz, and performing inverse fourier transform (IFFT) on the product to obtain a time domain signal corresponding to the part or all fields.

For example, assuming that the frequency domain signals corresponding to the part or all of the fields are [ Y1, Y2, …, Yn ], the n twiddle factors are [ K1, K2, …, Kn ], Y1 to Yn represent the frequency domain signals corresponding to the n Y MHz, K1 to Kn represent the twiddle factors corresponding to the n Y MHz, respectively, the product of the frequency domain signals corresponding to the part or all of the fields and the twiddle factor sequence may be represented as [ Y1K 1, Y2K 2, …, Yn Kn ], and the time domain signals corresponding to the part or all of the fields may be represented as IFFT [ Y1K 1, Y2K 2, …, Yn Kn ].

Accordingly, when a peak to average power ratio (PAPR) of the partial or all fields is calculated according to the time domain signals corresponding to the partial or all fields, the time domain signals corresponding to the partial or all fields may be oversampled to obtain analog domain signals, for example,adopting 5 times of oversampling, and assuming that the time domain signal after oversampling is S_iThe PAPR can be calculated by the following formula (1) where max represents taking the maximum value and mean represents taking the average value.

Further, the X MHz-wide PPDU includes a plurality of fields, which are transmitted over an X MHz channel including n Y MHz. At least partial fields of PPDUs borne by n Y MHz are multiplied by n twiddle factor vectors with the length of n in a one-to-one correspondence mode on a frequency domain, wherein at least partial fields of PPDUs borne by each Y MHz are multiplied by the same coefficient of the twiddle factor vector, namely, data borne by all subcarriers contained in the Y MHz are multiplied by the same coefficient, and thus the PAPR of at least partial fields of the PPDUs is reduced. Through computer simulation, the PAPR obtained by multiplying the twiddle factor selected from any complex number is not much different from that obtained by multiplying the twiddle factor selected from a fixed set. In order to realize simplicity and reduce complexity of product realization, the fixed set of twiddle factors selected by the application is [1, -1, j, -j ].

Further, each Y MHz may include multiple subcarriers, for example, when Y is 20, each 20MHz may include 64 subcarriers, or 128, or 256, or 512 subcarriers. When the wireless communication equipment generates the PPDU with the X MHz bandwidth, signals can not be carried on the middle subcarrier of the subcarriers of the two side parts of the X MHz bandwidth, so that the interference of adjacent frequency bands and direct current interference can be avoided. In order to be compatible with PPDUs with small bandwidths, every 20M carrying a legacy preamble may also include sideband subcarriers, not carrying signals.

For example, as shown in fig. 5, taking an example that the 80MHz bandwidth includes 4 20MHz, and each 20MHz includes 64 subcarriers, the subcarrier sequence numbers included in the 80MHz bandwidth may be represented as-128 to 127. In FIG. 5, the subcarriers with subcarrier numbers-128 to-123 and 123 to 127 are the subcarriers of the sideband part, and 3 subcarriers with subcarrier numbers-1 to 1 are the middle subcarriers, then no signal can be carried on the subcarriers with subcarrier numbers-128 to-123, 123 to 127 and-1 to 1. The serial numbers of sideband subcarriers of 20MHz are-32 to-27 and 27 to 31. It should be noted that, in the embodiment of the present application, only the 80MHz bandwidth is taken as an example for illustration, and the X MHz bandwidth greater than 160MHz may also be designed according to the above-mentioned 80MHz bandwidth, which is not described again in the embodiment of the present application.

Specifically, when the wireless communication device generates a PPDU of an X MHz bandwidth, a sequence of twiddle factors of the PPDU may be obtained by means of computer search. Inputting the bandwidth X MHz of PPDU and the number n of twiddle factors, and obtaining a plurality of twiddle factor sequences. Further, the PAPR sum of the rotated fields corresponding to each twiddle factor sequence may be obtained, and the twiddle factor sequence corresponding to the smallest PAPR sum may be selected as the optimal twiddle factor sequence of the PPDU.

Further, in the embodiment of the present application, when the X MHz is 240MHz or 320MHz, respectively, and Y is 20MHz, the first four twiddle factors of the twiddle factor sequence may be considered as twiddle factors of the current 80MHz bandwidth, that is, the first four twiddle factors in the twiddle factor sequence are [ 1-1-1-1 ]. When a computer is used for searching the twiddle factor sequence of the PPDU of X MHz, the searching range can be reduced and the searching efficiency can be improved according to the first four twiddle factors in the twiddle factor sequence.

Further, in the embodiment of the present application, when the X MHz is 240MHz or 320MHz, respectively, and Y is 20MHz, it may also be considered that the first eight twiddle factors of the twiddle factor sequence are twiddle factors of the current 160MHz bandwidth, that is, the first eight twiddle factors in the twiddle factor sequence are [ 1-1-1-11-1-1 ]. When a computer is used for searching the twiddle factor sequence of the PPDU of X MHz, the search range can be narrowed and the search efficiency can be improved according to the first eight twiddle factors in the twiddle factor sequence.

Step S302: and the sending end equipment sends the PPDU with the X MHz bandwidth.

After the sending end device generates the PPDU with the X MHz bandwidth, the sending end device may send the PPDU with the X MHz bandwidth to other wireless communication devices.

Accordingly, the receiving end device receives the PPDU.

S303: and the receiving end equipment performs rotation recovery on the PPDU according to the rotation factor sequence.

The receiving end equipment can perform corresponding rotation recovery on the received PPDU with the X MHz bandwidth to obtain the PPDU before rotation; or directly using the twiddle factor as a part of the channel, and removing the twiddle factor through channel estimation and channel equalization.

Specifically, for each Y MHz, the receiving end device may also perform rotation recovery on it by multiplying it by a rotation factor. For example, when the twiddle factor corresponding to the Y MHz used by the transmitting side is 1, the twiddle factor when the receiving side performs corresponding twiddle restoration may be 1, or the receiving side does not perform twiddle restoration on the Y MHz with the twiddle factor of 1; when the twiddle factor corresponding to the Y MHz used by the transmitting side is-1, the twiddle factor when the corresponding rotation of the receiving side is recovered can be-1; when the twiddle factor corresponding to the Y MHz used by the transmitting side is-j, the twiddle factor when the corresponding rotation of the receiving side is restored may be j; when the twiddle factor corresponding to the Y MHz used by the transmitting side is j, the twiddle factor corresponding to the rotation recovery at the receiving side may be-j.

Illustratively, the sequence of twiddle factors when X ═ 320MHz is explained in detail by (one) - (six) below.

In the twiddle factor sequence shown in the following table, the twiddle factor 1 corresponds to a rotation angle of 0 degrees, the twiddle factor-1 corresponds to a rotation angle of 180 degrees, the twiddle factor j corresponds to a rotation angle of 90 degrees, and the twiddle factor-j corresponds to a rotation angle of-90 degrees.

When X is 320MHz, a rotation angle sequence corresponding to the 320MHz rotation factor sequence is listed, that is, each rotation factor in the 320MHz rotation factor sequence is converted into a corresponding rotation angle, that is, the corresponding rotation angle sequence is obtained.

When X is 320MHz, there are two PPDU transmission modes, one is continuous 320MHz PPDU and the other is discontinuous 160MHz +160MHz PPDU. For the discontinuous 160MHz +160MHz PPDU, the 160MHz twiddle factor sequence defined in the existing standard or the 320MHz twiddle factor sequence provided by the embodiment of the present application can be used, that is, the embodiment of the present application considers the characteristic of PAPR compatible with 160MHz when designing the 320MHz twiddle factor.

320MHz, taking into account the full bandwidth and preamble puncturing, and compatible with the PAPR characteristics of 160MHz

When X is 320, n is 16, i.e. the length of the twiddle factor sequence is 16.

In one scenario, since the 240MHz bandwidth is a result of the 802.11be full-bandwidth puncturing that may be 320MHz, PAPR characteristics compatible with 240MHz and 160MHz twiddle factors may be considered when designing twiddle factor sequences for 320MHz bandwidth. Illustratively, when designing a 320MHz twiddle factor sequence, consider the following table 1-1:

TABLE 1-1

Case 1	320MHz[1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1]
		Case 2	240MHz[1 1 1 1 x x x x 1 1 1 1 1 1 1 1]
Case 3	240MHz[1 1 1 1 1 1 1 1 x x x x 1 1 1 1]
		Case 4	240MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x x x]
Case 5	240MHz[x x x x 1 1 1 1 1 1 1 1 1 1 1 1]
		Case 6	160MHz[1 1 1 1 1 1 1 1 xxxx xxxx]
Case 7	160MHz[xxxx xxxx 1111 1111]

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

The PAPR characteristics of the rotation factors of 240MHz and 160MHz are compatible, which means that when designing a rotation factor sequence of a PPDU with a full bandwidth (320MHz), the PAPR of the rotation factor sequence of 240MHz and 160MHz should be compatible and considered is also optimal, that is, the sum of the PAPR of the fields obtained by rotating the fields in the PPDU of 240MHz or 160MHz using the rotation factor sequence is the minimum. Here, 160MHz as shown in Case6 and Case7 is used to construct a discontinuous 320MHz PPDU.

Specifically, if the 320MHz bandwidth employs a discontinuous transmission mode of 160MHz +160MHz PPDUs, one 160MHz PPDU shown by Case6 and one 160MHz PPDU shown by Case7 may be employed. When designing a 320MHz twiddle factor sequence, the following conditions are satisfied: when the first eight twiddle factors of Case6 are adopted to carry out field rotation, the sum of PAPRs of the rotated fields is minimum; when the latter eight twiddle factors of Case7 are adopted to carry out field rotation, the sum of PAPRs of the rotated fields is minimum; when the sixteen twiddle factors obtained from Case 6+ Case7 are adopted for field rotation, the sum of PAPRs of the rotated fields is minimum.

If the 320MHz bandwidth adopts a discontinuous transmission mode of 160MHz +160MHz PPDU, a 160MHz twiddle factor sequence defined by the existing standard can also be adopted. For example, the first 160MHz segment uses the 160MHz rotation factor defined by the existing standard, and the second 160MHz segment also uses the 160MHz rotation factor defined by the existing standard. When the first segment or the field in the first segment is rotated by using the 160MHz twiddle factor sequence defined by the existing standard, the sum of PAPRs of the rotated fields is minimum.

In one implementation, a rotation of 320MHz bandwidthThe twiddle factor can start with 4 twiddle factors of the existing 80M bandwidth, i.e. the twiddle factor sequence of the 320MHz bandwidth is [ PR₈₀ C₁ C₂ … C₁₂]. Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]In addition to C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequences as shown in the following tables 1-2 were obtained by the above computer search method:

tables 1 to 2

Wherein, the rotation angle sequence corresponding to the sequence 1 is [ 01801809090909018090180-.

In the specific implementation, starting with 4 twiddle factors of the existing 80M bandwidth, all possible twiddle factor sequences are searched by a computer search method, then, for each twiddle factor sequence, the maximum peak-to-average power ratio (MAX) PAPR of L-STF and L-LTF corresponding to 7 cases in table 1-1 is obtained, and the maximum value of the MAX PAPR is selected (i.e. the worst Case). And then comparing the MAX PAPR sum of each kind of twiddle factor sequence, and selecting the sequence corresponding to the minimum MAX PAPR sum as the optimal twiddle factor sequence. As shown in Table 1-2, the best twiddle factor sequences selected were SEQ ID No. 1 and SEQ ID No. 2. Wherein, the PAPR of the sequence 1 is adopted, the PAPR of the L-STF is 6.2704, the PAPR of the L-LTF is 7.1231, and the PAPR of the Case7 obtained by adopting the sequence 1 is adopted; in sequence 2, the PAPR of L-STF is 6.2704, the PAPR of L-LTF is 7.1231, and the PAPR obtained by using sequence 2 is the PAPR of Case 7. Of course, this application is not limited to other twiddle factor sequences that may be employed.

In yet another implementation, the twiddle factor for a 320MHz bandwidth may start with 8 twiddle factors for an existing 160M bandwidth, i.e., the twiddle factor for the 320MHz bandwidth is in the sequence [ PR₁₆₀ C₁ C₂ … C₈]. Wherein PR₁₆₀Is a rotation factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]In addition to C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 1-3 below were obtained by computer search:

tables 1 to 3

The rotation angle sequence corresponding to the sequence 1 is [ 0180180180018018018018018000180018090 ], the rotation angle sequence corresponding to the sequence 2 is [ 01801801800180180180180180001800180-90 ], the rotation angle sequence corresponding to the sequence 3 is [ 018018001801801801801801809090- & 901800- & 900 ], the rotation angle sequence corresponding to the sequence 4 is [ 01801801800180180180180-90-90901800900 ], the rotation angle sequence corresponding to the sequence 5 is [ 01801801800180180180180180001800900 ], and the rotation angle sequence corresponding to the sequence 6 is [ 01801801801800180180180180180180180180001800- & 900 ].

In the specific implementation, starting with 8 twiddle factors of the existing 160M bandwidth, all possible twiddle factor sequences are searched by a computer search method, then, for each twiddle factor sequence, the maximum peak-to-average power ratio (MAX) PAPR of L-STF and L-LTF corresponding to 7 cases in table 1-1 is obtained, and the maximum value of the MAX PAPR is selected (i.e. the worst PAPR). And then comparing the MAX PAPR sum of each kind of twiddle factor sequence, and selecting the sequence corresponding to the minimum MAX PAPR sum as the optimal twiddle factor sequence. As shown in tables 1-3, the best twiddle factor sequences selected were SEQ ID Nos. 1 to 6. Of course, this application is not limited to other twiddle factor sequences that may be employed.

In yet another scenario, preamble puncturing may also be disregarded when designing the twiddle factor sequence for 320MHz bandwidth, and only PAPR properties compatible with 160MHz twiddle factors are considered. Illustratively, there are several cases as shown in tables 1-4 below:

tables 1 to 4

Case 1	320MHz[1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1]
		Case 2	160MHz[1 1 1 1 1 1 1 1 xxxx xxxx]
Case 3	160MHz[xxxx xxxx 1111 1111]

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

PAPR performance per 160MHz is also considered when designing a sequence of twiddle factors for a contiguous 320MHz bandwidth.

In one implementation, the 320M bandwidth twiddle factor starts with the existing 4 twiddle factors of 80M bandwidth, i.e., the twiddle factor sequence [ PR₈₀ C₁ C₂ … C₁₂]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]In addition to C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 1-5 below were obtained by computer search:

tables 1 to 5

In the specific implementation, starting with 4 twiddle factors of the existing 80M bandwidth, all possible twiddle factor sequences are searched by a computer search method, then for each twiddle factor sequence, the PAPR sum of L-STF and L-LTF corresponding to 3 cases in tables 1-4 is obtained, and the maximum value (i.e. worst Case) of the PAPR sum is selected. And then comparing the MAX PAPR sum of each kind of twiddle factor sequence, and selecting the sequence corresponding to the minimum MAX PAPR sum as the optimal twiddle factor sequence. As shown in tables 1-5, the best twiddle factor sequences selected were SEQ ID No. 1 and SEQ ID No. 2. Wherein, the PAPR of the sequence 1 is adopted, the PAPR of the L-STF is 4.7126, the PAPR of the L-LTF is 6.1506, and the PAPR of the Case1 obtained by adopting the sequence 1 is adopted; with sequence 2, the PAPR of L-STF is 4.7126, the PAPR of L-LTF is 6.1506, and the PAPR obtained with sequence 2 for Case 1. Of course, this application is not limited to other twiddle factor sequences that may be employed.

In yet another implementation, the twiddle factor for the 320M band may start with 8 twiddle factors for the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₈]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]In addition to C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 1-6 below were obtained by computer search:

tables 1 to 6

In the specific implementation, starting with 8 twiddle factors of the existing 160M bandwidth, all possible twiddle factor sequences are searched by a computer search method, then for each twiddle factor sequence, the PAPR sum of L-STF and L-LTF corresponding to 3 cases in tables 1-4 is obtained, and the maximum value (i.e. worst Case) of the PAPR sum is selected. And then comparing the MAX PAPR sum of each kind of twiddle factor sequence, and selecting the sequence corresponding to the minimum MAX PAPR sum as the optimal twiddle factor sequence. As shown in tables 1 to 6, the best twiddle factor sequences selected were SEQ ID Nos. 1 to 19. Of course, this application is not limited to other twiddle factor sequences that may be employed.

X is 320MHz, taking into account the full bandwidth case, and is not compatible with the PAPR characteristics of 160 MHz. Regardless of the 160 MHz-compatible twiddle factor design, in this case, a non-continuous 320MHz transmission may take on the twiddle factor value at the existing 160MHz bandwidth.

In one scenario, because the 240MHz bandwidth is a result of the full bandwidth puncturing of 320MH in 802.11be, the PAPR characteristic of the 240MHz twiddle factor is considered while designing the twiddle factor for the 320MHz bandwidth. Illustratively, when designing a 320MHz twiddle factor sequence, the considerations are as shown in Table 2-1 below:

TABLE 2-1

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, the 320M bandwidth twiddle factor may begin with the existing 4 twiddle factors of the 80M bandwidth, i.e., the twiddle factor sequence [ PR₈₀ C₁ C₂ … C₁₂]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]In addition to C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. Obtaining the optimal twiddle factor sequence shown in the following table 2-2 through computer search:

tables 2 to 2

Specifically, for 5 cases in Table 2-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 5 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in table 2-2. Wherein, the maximum value of the sum of PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case1, specifically, the PAPR of the L-STF is 5.9662, and the PAPR of the L-LTF is 7.0234; the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 2 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 2 is adopted by the Case2, specifically, the PAPR of the L-STF is 5.9662, and the PAPR of the L-LTF is 7.0234.

And if the PAPR characteristic of the L-SIG field is further considered, alternative twiddle factor sequences are shown in tables 2-3 below:

tables 2 to 3

In yet another implementation, the 320M bandwidth twiddle factor may start with 8 twiddle factors of the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₈]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]In addition to C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequences as shown in tables 2-4 were obtained by computer search:

tables 2 to 4

The MAX PAPR of sequence 2 and sequence 3 is the minimum, so sequence 2 and sequence 3 are the optimal twiddle factor sequences.

In yet another scenario, only the PAPR properties of consecutive 320MHz are considered, i.e. only Case [ 1111111111111111 ] is considered.

In one implementation, the 320M bandwidth twiddle factor starts with the existing 4 twiddle factors of 80M bandwidth, i.e., the twiddle factor sequence [ PR₈₀ C₁ C₂ … C₁₂]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 2-5 below were obtained by computer search:

tables 2 to 5

Wherein, the PAPR of the L-STF is 4.4945 and the PAPR of the L-LTF is 5.4167 by adopting the sequence 1; adopting the sequence 2, wherein the PAPR of the L-STF is 4.4722, and the PAPR of the L-LTF is 5.5214; adopting the sequence 3, wherein the PAPR of the L-STF is 4.4558, and the PAPR of the L-LTF is 5.5349; with the sequence 4, the PAPR of the L-STF is 4.5573, and the PAPR of the L-LTF is 5.4336.

The MAX PAPR corresponding to sequence 4 is the minimum, so sequence 4 is the optimal twiddle factor sequence.

In yet another implementation, the 320M bandwidth twiddle factor may start with 8 twiddle factors of the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C1 C2 … C8]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]. In addition Ci belongs to the twiddle factor candidate [ 1-1 j-j]. The optimal twiddle factors as shown in tables 2-6 below were obtained by computer search:

tables 2 to 6

Specifically, for the case of continuous 320M bandwidth, the PAPR sum of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the twiddle factor sequence corresponding to the minimum value of the PAPR sum of L-STF and L-LTF is taken as the optimal selection factor sequence, i.e., sequence 1 shown in tables 2-6.

X (three) is 320MHz, the case of preamble puncturing is considered, the full bandwidth is not considered, and the design of a 160MHz twiddle factor is not compatible. There are several cases as shown in the following table 3-1:

TABLE 3-1

Case1	280MHz[x x 1 1 1 1 1 1 1 1 1 1 1 1 1 1]
		Case2	280MHz[1 1 x x 1 1 1 1 1 1 1 1 1 1 1 1]
Case3	280MHz[1 1 1 1 x x 1 1 1 1 1 1 1 1 1 1]
		Case4	280MHz[1 1 1 1 1 1 x x 1 1 1 1 1 1 1 1]
Case5	280MHz[1 1 1 1 1 1 1 1 x x 1 1 1 1 1 1]
		Case6	280MHz[1 1 1 1 1 1 1 1 1 1 x x 1 1 1 1]
Case7	280MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x 1 1]
		Case8	280MHz[1 1 1 1 1 1 1 1 1 1 1 1 1 1 x x]
Case9	240MHz[1 1 1 1 x x x x 1 1 1 1 1 1 1 1]
		Case10	240MHz[1 1 1 1 1 1 1 1 x x x x 1 1 1 1]
Case11	240MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x x x]
		Case12	240MHz[x x x x 1 1 1 1 1 1 1 1 1 1 1 1]

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, the 320M bandwidth twiddle factor may be started with the existing 4 twiddle factors of 80M bandwidth, i.e., the twiddle factor sequence [ PR₈₀ C₁ C₂ … C₁₂]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 3-2 were obtained by computer search:

TABLE 3-2

Specifically, for 12 cases in Table 3-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 12 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 and sequence 2 as shown in table 3-2. Wherein the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case4/Case5, specifically, the PAPR of the L-STF is 6.6412, and the PAPR of the L-LTF is 7.5520; the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 2 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 2 is adopted by the Case4/Case5, specifically, the PAPR of the L-STF is 6.6412, and the PAPR of the L-LTF is 7.5520.

In yet another implementation, the twiddle factor for the 320MHz bandwidth may start with 8 twiddle factors for the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₈]Wherein PR₁₆₀Is a rotation factor of the existing 160MHz bandwidth [ 1-1-1-11-1-1-1]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 3-3 below were obtained by computer search:

tables 3 to 3

Specifically, for 12 cases in Table 3-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 12 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in tables 3-3. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case10, specifically, the PAPR of the L-STF is 7.2495, and the PAPR of the L-LTF is 7.8937.

In yet another implementation, the 320MHz twiddle factor sequence may also take into account an existing 160M bandwidth twiddle factor or an 80M bandwidth twiddle factor. Specifically, the 320MHz twiddle factor sequence may be in the form of: [ PR ]₈₀ C₁PR₈₀C₂PR₈₀ C₃PR₈₀]Or [ PR ]₁₆₀C₁PR₁₆₀]. Wherein, PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1],PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]。C_iPR₈₀Means each PR₈₀Twiddle factor of C_i，C_iPR₁₆₀Means each PR₁₆₀Twiddle factor of C_iHere, C_iMay be 1, -1, j, or-j. The specific sequences obtained are shown in tables 3-4 below:

tables 3 to 4

Specifically, for 12 cases in Table 3-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 12 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the optimal selection factor sequence, i.e. the sequence shown in tables 3-4. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence is the sum of the PAPRs of the L-STF and the L-LTF when the sequence is adopted by Case5, specifically, the PAPR of the L-STF is 8.1034, and the PAPR of the L-LTF is 8.6353.

And (four) X is 320MHz, the case of preamble puncturing is considered, the full bandwidth is not considered, and the design of a 160MHz twiddle factor is compatible. There are several cases as shown in the following table 4-1:

TABLE 4-1

Case1	280MHz[x x 1 1 1 1 1 1 1 1 1 1 1 1 1 1]
		Case2	280MHz[1 1 x x 1 1 1 1 1 1 1 1 1 1 1 1]
Case3	280MHz[1 1 1 1 x x 1 1 1 1 1 1 1 1 1 1]
		Case4	280MHz[1 1 1 1 1 1 x x 1 1 1 1 1 1 1 1]
Case5	280MHz[1 1 1 1 1 1 1 1 x x 1 1 1 1 1 1]
		Case6	280MHz[1 1 1 1 1 1 1 1 1 1 x x 1 1 1 1]
Case7	280MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x 1 1]
		Case8	280MHz[1 1 1 1 1 1 1 1 1 1 1 1 1 1 x x]
Case9	240MHz[1 1 1 1 x x x x 1 1 1 1 1 1 1 1]
		Case10	240MHz[1 1 1 1 1 1 1 1 x x x x 1 1 1 1]
Case11	240MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x x x]
		Case12	240MHz[x x x x 1 1 1 1 1 1 1 1 1 1 1 1]
Case13	160MHz[1 1 1 1 1 1 1 1 x x x x x x x x]
		Case14	160MHz[x x x x x x x x 1 1 1 1 1 1 1 1]

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, the 320M bandwidth twiddle factor may begin with the existing 4 twiddle factors of the 80M bandwidth, i.e., the twiddle factor sequence [ PR₈₀ C₁ C₂ … C₁₂]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 4-2 were obtained by computer search:

TABLE 4-2

Specifically, for 14 cases in Table 4-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 14 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in table 4-2. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case14, specifically, the PAPR of the L-STF is 6.7948, and the PAPR of the L-LTF is 7.7562.

In yet another implementation, considering site compatibility of the existing 802.11ac and 802.11ax mandatory 160M bandwidths, the twiddle factor for the 320MHz band thus starts with 8 twiddle factors for the existing 160M bandwidth, i.e., a twiddle factor sequence [ PR ]₁₆₀C₁ C₂ … C₈]Wherein PR₁₆₀Is a rotation factor of the existing 160MHz bandwidth [ 1-1-1-11-1-1-1]In addition to C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 4-3 below were obtained by computer search:

tables 4 to 3

Specifically, for 14 cases in Table 4-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 14 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in tables 4-3. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case10, specifically, the PAPR of the L-STF is 7.2495, and the PAPR of the L-LTF is 7.8937.

In yet another implementation, the 320MHz twiddle factor sequence may also take into account an existing 160M bandwidth twiddle factor or an 80M bandwidth twiddle factor. Specifically, the 320MHz twiddle factor sequence may be in the form of: [ PR ]₈₀ C₁PR₈₀C₂PR₈₀ C₃PR₈₀]Or [ PR ]₁₆₀C₁PR₁₆₀]. Wherein, PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]，PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]。C_iPR₈₀Means each PR₈₀Twiddle factor of C_i，C_iPR₁₆₀Means each PR₁₆₀Twiddle factor of C_iHere, C_iMay be 1, -1, j, or-j. The specific sequences obtained are shown in tables 4-4 below:

specifically, for 14 cases in Table 4-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 14 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the optimal selection factor sequence, i.e. the sequence shown in table 4-4. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence is the sum of the PAPRs of the L-STF and the L-LTF when the sequence is adopted by Case5, specifically, the PAPR of the L-STF is 8.1034, and the PAPR of the L-LTF is 8.6353.

Tables 4 to 4

And (five) X is 320MHz, the full bandwidth and preamble puncturing case is considered, and the design of the rotation factor of 160MHz is compatible. There are several cases as shown in the following table 5-1:

TABLE 5-1

Case1	320MHz[1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1]
		Case2	280MHz[x x 1 1 1 1 1 1 1 1 1 1 1 1 1 1]
Case3	280MHz[1 1 x x 1 1 1 1 1 1 1 1 1 1 1 1]
		Case4	280MHz[1 1 1 1 x x 1 1 1 1 1 1 1 1 1 1]
Case5	280MHz[1 1 1 1 1 1 x x 1 1 1 1 1 1 1 1]
		Case6	280MHz[1 1 1 1 1 1 1 1 x x 1 1 1 1 1 1]
Case7	280MHz[1 1 1 1 1 1 1 1 1 1 x x 1 1 1 1]
		Case8	280MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x 1 1]
Case9	280MHz[1 1 1 1 1 1 1 1 1 1 1 1 1 1 x x]
		Case10	240MHz[1 1 1 1 x x x x 1 1 1 1 1 1 1 1]
Case11	240MHz[1 1 1 1 1 1 1 1 x x x x 1 1 1 1]
		Case12	240MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x x x]
Case13	240MHz[x x x x 1 1 1 1 1 1 1 1 1 1 1 1]
		Case14	160MHz[1 1 1 1 1 1 1 1 x x x x x x x x]
Case15	160MHz[x x x x x x x x 1 1 1 1 1 1 1 1]

Where 1 indicates that the 20MHz is not punctured and the unit is, x indicates that the 20MHz is punctured.

In one implementation, the 320M bandwidth twiddle factor starts with the existing 4 twiddle factors of 80M bandwidth, i.e., the twiddle factor sequence [ PR₈₀ C₁ C₂ … C₁₂]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 5-2 were obtained by computer search:

TABLE 5-2

Specifically, for 15 cases in Table 5-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 15 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in table 5-2. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case15, specifically, the PAPR of the L-STF is 6.7948, and the PAPR of the L-LTF is 7.7562.

In yet another implementation, the twiddle factor for the 320MHz bandwidth may start with 8 twiddle factors for the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₈]Wherein PR₁₆₀Is a rotation factor of the existing 160MHz bandwidth [ 1-1-1-11-1-1-1]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 5-3 below were obtained by computer search:

tables 5 to 3

Specifically, for 15 cases in Table 5-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 15 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in tables 5-3. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case11, specifically, the PAPR of the L-STF is 7.2495, and the PAPR of the L-LTF is 7.8937.

In yet another implementation, the 320MHz twiddle factor sequence may also take into account an existing 160M bandwidth twiddle factor or an 80M bandwidth twiddle factor. Specifically, the 320MHz twiddle factor sequence may be in the form of: [ PR ]₈₀ C₁PR₈₀C₂PR₈₀ C₃PR₈₀]Or [ PR ]₁₆₀C₁PR₁₆₀]. Wherein, PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1],PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]。C_iPR₈₀Means each PR₈₀Twiddle factor of C_i，C_iPR₁₆₀Means each PR₁₆₀Twiddle factor of C_iHere, C_iMay be 1, -1, j, or-j. The specific sequences obtained are shown in tables 5-4 below:

tables 5 to 4

Specifically, for 15 cases in Table 5-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 15 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the optimal selection factor sequence, i.e. the sequence shown in table 5-4. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence is the sum of the PAPRs of the L-STF and the L-LTF when the sequence is adopted by Case6, specifically, the PAPR of the L-STF is 8.1034, and the PAPR of the L-LTF is 8.6353.

X is 320MHz, considering the full bandwidth and preamble puncturing case, and is not compatible with the design of the 160MHz twiddle factor. There are several cases as shown in the following Table 6-1:

TABLE 6-1

Case1	320MHz[1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1]
		Case2	280MHz[x x 1 1 1 1 1 1 1 1 1 1 1 1 1 1]
Case3	280MHz[1 1 x x 1 1 1 1 1 1 1 1 1 1 1 1]
		Case4	280MHz[1 1 1 1 x x 1 1 1 1 1 1 1 1 1 1]
Case5	280MHz[1 1 1 1 1 1 x x 1 1 1 1 1 1 1 1]
		Case6	280MHz[1 1 1 1 1 1 1 1 x x 1 1 1 1 1 1]
Case7	280MHz[1 1 1 1 1 1 1 1 1 1 x x 1 1 1 1]
		Case8	280MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x 1 1]
Case9	280MHz[1 1 1 1 1 1 1 1 1 1 1 1 1 1 x x]
		Case10	240MHz[1 1 1 1 x x x x 1 1 1 1 1 1 1 1]
Case11	240MHz[1 1 1 1 1 1 1 1 x x x x 1 1 1 1]
		Case12	240MHz[1 1 1 1 1 1 1 1 1 1 1 1 x x x x]
Case13	240MHz[x x x x 1 1 1 1 1 1 1 1 1 1 1 1]

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, the 320M bandwidth twiddle factor may begin with the existing 4 twiddle factors of the 80M bandwidth, i.e., the twiddle factor sequence [ PR₈₀ C₁ C₂ … C₁₂]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. Searching by computerThe optimum twiddle factors shown in the following Table 6-2 were obtained:

TABLE 6-2

Specifically, for the 13 cases in Table 6-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 13 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in table 6-2. When the sequence 1 is adopted, the sum of MAX PAPRs is 14.0985, specifically, the PAPR of L-STF is 6.5685, and the PAPR of L-LTF is 7.5300; when the sequence 2 is adopted, the sum of MAX PAPRs is 14.0985, specifically, the PAPR of L-STF is 6.5685, and the PAPR of L-LTF is 7.5300. And the MAX PAPR of sequence 1 and sequence 2 is the smallest of the MAX PAPR corresponding to all searched twiddle factor sequences.

In yet another implementation, the 320M bandwidth twiddle factor may start with 8 twiddle factors of the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₈]Wherein PR₁₆₀Is a twiddle factor (1-1-1-11-1-1-1) of the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors shown in tables 6-3 below were obtained by computer search:

tables 6 to 3

Specifically, for the 13 cases in Table 6-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 13 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in tables 6-3.

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂ … C₁₅]In which C is_iBelonging to twiddle factor candidate value [ 1-1]. The optimal twiddle factor sequences as shown in tables 6-4 below were obtained by computer search:

tables 6 to 4

Specifically, for the 13 cases in Table 6-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 13 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. the sequence shown in table 6-4.

Illustratively, the sequence of twiddle factors when X is 240MHz is explained in detail by (seven) - (twelve).

And (seven) X is 240MHz, only the full bandwidth case is considered without considering preamble puncturing, and PAPR characteristics of 160MHz and 80MHz are compatible.

In one scenario, several cases are considered when designing a twiddle factor sequence of X-240 MHz as shown in table 7-1 below:

TABLE 7-1

Case 1	240MHz[1 1 1 1 1 1 1 1 1 1 1 1]
		Case 2	160MHz[x x x x 1 1 1 1 1 1 1 1]
Case 3	160MHz[1 1 1 1 1 1 1 1 x x x x]
		Case 4	80MHz[1 1 1 1 x x x x x x x]
Case 5	80MHz[x x x x x x x x 1 1 1 1]

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, the 240M bandwidth twiddle factor may begin with 4 twiddle factors of the existing 80M bandwidth, i.e., a sequence of twiddle factors [ PR ]₈₀ C₁ C₂ … C₈]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 7-2 were obtained by computer search:

TABLE 7-2

Specifically, for 5 cases in Table 7-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 5 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in table 7-2. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case2, specifically, the PAPR of the L-STF is 5.0997, and the PAPR of the L-LTF is 6.1761.

In yet another implementation, a twiddle factor sequence [1C ] is utilized₁ C₂ … C₁₁]，C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 7-3 below were obtained by computer search:

tables 7 to 3

Specifically, for 5 cases in Table 7-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 5 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in tables 7-3. Wherein the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case2/Case3, specifically, the PAPR of the L-STF is 5.2497, and the PAPR of the L-LTF is 5.9335; the maximum value of the sum of PAPRs of L-ST and L-LTF corresponding to the sequence 2 is the sum of PAPRs of L-STF and L-LTF when the sequence 2 is adopted by the Case2/Case3, specifically, the PAPR of the L-STF is 5.2497, and the PAPR of the L-LTF is 5.9335.

In yet another scenario, several cases are considered when designing a twiddle factor sequence of X-240 MHz as shown in tables 7-4 below:

tables 7 to 4

Case 1	240MHz[1 1 1 1 1 1 1 1 1 1 1 1]
		Case 2	160MHz[x x x x 1 1 1 1 1 1 1 1]
Case 3	80MHz[1 1 1 1 x x x x x x x x]

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, a twiddle factor sequence [1C ] is utilized₁ C₂ … C₁₁]，C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 7-5 below were obtained by computer search:

tables 7 to 5

Specifically, for 3 cases in tables 7-4, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 3 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 shown in tables 7-5. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case2, specifically, the PAPR of the L-STF is 4.8274, and the PAPR of the L-LTF is 5.9396.

In yet another scenario, several cases are considered when designing a twiddle factor sequence of X-240 MHz as shown in tables 7-6 below:

tables 7 to 6

Case 1	240MHz[1 1 1 1 1 1 1 1 1 1 1 1]
		Case 2	160MHz[1 1 1 1 1 1 1 1x x x x]
Case 3	80MHz[x x x x x x x x1 1 1 1]

In one implementation, a twiddle factor sequence [1C ] is utilized₁ C₂ … C₁₁]，C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 7-7 below were obtained by computer search:

tables 7 to 7

Specifically, for 3 cases in tables 7-6, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 3 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 shown in tables 7-7. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case2, specifically, the PAPR of the L-STF is 4.8274, and the PAPR of the L-LTF is 5.9396.

In yet another implementation, the 240M bandwidth twiddle factor may start with 8 twiddle factors of the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₄]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 7-8 below were obtained by computer search:

tables 7 to 8

And (eight) X is 240MHz, only the full bandwidth Case is considered without considering preamble puncturing, and PAPR characteristics of 160MHz and 80MHz are incompatible, i.e., only one Case of Case1[ 111111111111 ] is considered when designing twiddle factor sequence.

For a discontinuous 160+80MHz PPDU, a twiddle factor already defined by the 160MHz standard on the 160MHz segment, such as [ 1-1-1-11-1-1 ]; the 80MHz segment is subject to a twiddle factor, such as [ 1-1-1-1 ], that has been defined by the 80MHz standard.

In one implementation, the 240M bandwidth twiddle factor may begin with 4 twiddle factors of the existing 80M bandwidth, i.e., a sequence of twiddle factors [ PR ]₈₀ C₁ C₂ … C₈]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 8-1 were obtained by computer search:

TABLE 8-1

Wherein, the PAPR of the L-STF is 4.498565 and the PAPR of the L-LTF is 5.562613 by adopting the sequence 1; with the sequence 2, the PAPR of the L-STF is 4.498565, and the PAPR of the L-LTF is 5.562613.

Further, the twiddle factor sequence shown in the following table 8-2 can be obtained through computer search according to the PAPR characteristics of the L-SIG field and the like:

TABLE 8-2

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂… C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following tables 8-3 were obtained by computer search:

tables 8 to 3

Further, the twiddle factor sequences shown in the following tables 8-4 can be obtained through computer search according to the PAPR characteristics of the L-SIG field and the like:

tables 8 to 4

In yet another implementation, the 240M bandwidth twiddle factor may start with 8 twiddle factors of the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₄]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequences as shown in tables 8-5 below were obtained by computer search:

tables 8 to 5

Further, the twiddle factor sequences shown in the following tables 8 to 6 can be obtained by computer search according to the PAPR characteristics of the L-SIG field and the like:

tables 8 to 6

240MHz, only considering preamble puncturing, not considering full bandwidth, and compatible with PAPR characteristics of 160MHz and 80MHz

In designing a twiddle factor sequence of X-240 MHz, several cases are considered as shown in the following table 9-1:

TABLE 9-1

Case1	200MHz[x x 1 1 1 1 1 1 1 1 1 1]
		Case2	200MHz[1 1 x x 1 1 1 1 1 1 1 1]
Case3	200MHz[1 1 1 1 x x 1 1 1 1 1 1]
		Case4	200MHz[1 1 1 1 1 1 x x 1 1 1 1]
Case5	200MHz[1 1 1 1 1 1 1 1 x x 1 1]
		Case6	200MHz[1 1 1 1 1 1 1 1 1 1 x x]
Case7	160MHz[x x x x 1 1 1 1 1 1 1 1]
		Case8	160MHz[1 1 1 1 x x x x 1 1 1 1]
Case9	160MHz[1 1 1 1 1 1 1 1 x x x x]

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, the 240M bandwidth twiddle factor may begin with 4 twiddle factors of the existing 80M bandwidth, i.e., a sequence of twiddle factors [ PR ]₈₀ C₁ C₂ … C₈]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 9-2 were obtained by computer search:

specifically, for 9 cases in Table 9-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 9 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in table 9-2. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case3, specifically, the PAPR of the L-STF is 6.6907, and the PAPR of the L-LTF is 7.6521.

TABLE 9-2

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂ … C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following tables 9-3 were obtained by computer search:

tables 9 to 3

Specifically, for 9 cases in Table 9-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 9 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the optimal selection factor sequence, i.e., sequence 1 to sequence 4 shown in table 9-3.

In yet another implementation, the 240M bandwidth twiddle factor may start with 8 twiddle factors of the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₄]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors are obtained by computer search as shown in table 94 below:

tables 9 to 4

Specifically, for 9 cases in Table 9-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 9 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in tables 9-4.

In yet another implementation, the 240MHz twiddle factor sequence may also take into account an existing 160M bandwidth twiddle factor or an 80M bandwidth twiddle factor. Specifically, the sequence of 240MHz twiddle factors may be in the form of: [ PR ]₈₀ C₁PR₈₀C₂PR₈₀]Or [ PR ]₁₆₀C₁PR₈₀]Or [ PR ]₈₀ C₁PR₁₆₀]. Wherein, PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1],PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]。C_iPR₈₀Means each PR₈₀Twiddle factor of C_i，C_iPR₁₆₀Means each PR₁₆₀Twiddle factor of C_iHere, C_iMay be 1, -1, j, or-j. The specific sequences obtained are shown in tables 9-5 below:

tables 9 to 5

Specifically, for 9 cases in Table 9-1, the sum of the PAPRs of the L-STF and the L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 9 cases (i.e. the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. the sequence shown in table 9-5. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence is the sum of the PAPRs of the L-STF and the L-LTF when the sequence is adopted by the Case1/Case3/Case5, specifically, the PAPR of the L-STF is 7.6524, and the PAPR of the L-LTF is 8.7288.

And (ten) X is 240MHz, only preamble puncturing is considered, the full bandwidth case is not considered, and PAPR characteristics of 160MHz and 80MHz are compatible. Specifically, when designing a twiddle factor sequence of X ═ 240MHz, several cases as shown in the following table 10-1 can be considered:

TABLE 10-1

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, the 240M bandwidth twiddle factor may begin with 4 twiddle factors of the existing 80M bandwidth, i.e., a sequence of twiddle factors [ PR ]₈₀ C₁ C₂ … C₈]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 10-2 were obtained by computer search:

TABLE 10-2

Specifically, for 28 cases in Table 10-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 28 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. sequence 1 shown in table 10-2. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case3, specifically, the PAPR of the L-STF is 6.6907, and the PAPR of the L-LTF is 7.6521.

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂ … C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 10-3 were obtained by computer search:

tables 10-3

Specifically, for 28 cases in Table 10-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 28 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in table 10-3. Wherein the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case15/Case16, specifically, the PAPR of the L-STF is 6.5665, and the PAPR of the L-LTF is 7.6147; the maximum value of the sum of the PAPRs of the L-LTF and the L-LTF corresponding to the sequence 2 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 2 is adopted by the Case15/Case16, specifically, the PAPR of the L-STF is 6.5665, and the PAPR of the L-LTF is 7.6147.

In yet another implementation, the 240M bandwidth twiddle factor may start with 8 twiddle factors of the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₄]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in the following table 10-4 were obtained by computer search:

tables 10-4

Specifically, for 28 cases in Table 10-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 28 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in table 10-4.

In yet another implementation, the 240MHz twiddle factor sequence may also take into account an existing 160M bandwidth twiddle factor or an 80M bandwidth twiddle factor. Specifically, the sequence of 240MHz twiddle factors may be in the form of: twiddle factor [ PR₈₀C₁PR₈₀ C₂PR₈₀]Or [ PR₁₆₀C₁PR₈₀]Or [ PR₈₀C₁PR₁₆₀]. Wherein, PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]，PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]，C_iBelonging to twiddle factor candidate value [ 1-1 j-j]。C_iPR₈₀Means each PR₈₀Twiddle factor of C_i，C_iPR₁₆₀Means each PR₁₆₀Twiddle factor of C_iHere, C_iMay be 1, -1, j, or-j. The optimal twiddle factors as shown in tables 10-5 below were obtained by computer search:

tables 10 to 5

Specifically, for 28 cases in Table 10-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 28 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. the sequence shown in table 10-5. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence is the sum of the PAPRs of the L-STF and the L-LTF when the sequence is adopted by the Case1/Case3/Case5, specifically, the PAPR of the L-STF is 7.6524, and the PAPR of the L-LTF is 8.7288.

240MHz, considering preamble puncturing and full bandwidth, and compatible with PAPR characteristics of 160MHz and 80 MHz. Specifically, when designing a twiddle factor sequence of X ═ 240MHz, several cases are considered as in table 11-1 below:

TABLE 11-1

Case1	240MHz[1 1 1 1 1 1 1 1 1 1 1 1]
		Case2	200MHz[x x 1 1 1 1 1 1 1 1 1 1]
Case3	200MHz[1 1 x x 1 1 1 1 1 1 1 1]
		Case4	200MHz[1 1 1 1 x x 1 1 1 1 1 1]
Case5	200MHz[1 1 1 1 1 1 x x 1 1 1 1]
		Case6	200MHz[1 1 1 1 1 1 1 1 x x 1 1]
Case7	200MHz[1 1 1 1 1 1 1 1 1 1 x x]
		Case8	160MHz[x x x x 1 1 1 1 1 1 1 1]
Case9	160MHz[1 1 1 1 x x x x 1 1 1 1]
		Case10	160MHz[1 1 1 1 1 1 1 1 x x x x]
Case11	160MHz[1 1 1 1 1 1 1 1]
		Case12	160MHz[1 1 1 1 1 1 1 1]
Case13	120MHz[x x 1 1 1 1 1 1]
		Case14	120MHz[1 1 x x 1 1 1 1]
Case15	120MHz[1 1 1 1 x x 1 1]
		Case16	120MHz[1 1 1 1 1 1 x x]
Case17	120MHz[x x 1 1 1 1 1 1]
		Case18	120MHz[1 1 x x 1 1 1 1]
Case19	120MHz[1 1 1 1 x x 1 1]
		Case20	120MHz[1 1 1 1 1 1 x x]
Case21	80MHz[1 1 1 1]
		Case22	80MHz[1 1 1 1]
Case23	80MHz[1 1 1 1]
		Case24	40MHz[1 1 x x]
Case25	40MHz[x x 1 1]
		Case26	40MHz[1 1 x x]
Case27	40MHz[x x 1 1]
		Case28	40MHz[1 1 x x]
Case29	40MHz[x x 1 1]

Where 1 indicates that 20MHz is not punctured and x indicates that 20MHz is punctured.

In one implementation, the 240M bandwidth twiddle factor may begin with 4 twiddle factors of the existing 80M bandwidth, i.e., a sequence of twiddle factors [ PR ]₈₀ C₁ C₂ … C₈]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequence as shown in the following table 11-2 was obtained by computer search:

TABLE 11-2

Specifically, for 29 cases in Table 11-1, the sum of the PAPRs of the L-STF and the L-LTF obtained for each twiddle factor sequence obtained by computer search is calculated, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 29 cases (i.e., the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 shown in table 11-2. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case4/Case17, specifically, the PAPR of the L-STF is 6.6907, and the PAPR of the L-LTF is 7.6521.

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂ … C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequences as shown in the following tables 11-3 were obtained by computer search:

tables 11 to 3

Specifically, for 29 cases in Table 11-1, the sum of the PAPRs of the L-STF and the L-LTF obtained for each twiddle factor sequence obtained by computer search is calculated, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 29 cases (i.e., the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in tables 11-3. Wherein the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case16/Case17, specifically, the PAPR of the L-STF is 6.5665, and the PAPR of the L-LTF is 7.6147; the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 2 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 2 is adopted by the Case16/Case17, specifically, the PAPR of the L-STF is 6.5665, and the PAPR of the L-LTF is 7.6147.

In yet another implementation, the 240M bandwidth twiddle factor may start with 8 twiddle factors of the existing 160M bandwidth, i.e., a sequence of twiddle factors [ PR ]₁₆₀ C₁ C₂ … C₄]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factors as shown in tables 11-4 below were obtained by computer search:

tables 11 to 4

Specifically, for 29 cases in Table 11-1, the sum of the PAPRs of the L-STF and the L-LTF obtained for each twiddle factor sequence obtained by computer search is calculated, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 29 cases (i.e., the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in tables 11-4. Wherein, the maximum value of the sum of PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case1, specifically, the PAPR of the L-STF is 7.3775, and the PAPR of the L-LTF is 7.9883; the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 2 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 2 is adopted by the Case1, specifically, the PAPR of the L-STF is 7.3775, and the PAPR of the L-LTF is 7.9883.

In yet another implementation, the 240MHz twiddle factor sequence may also take into account an existing 160M bandwidth twiddle factor or an 80M bandwidth twiddle factor. Specifically, the sequence of 240MHz twiddle factors may be in the form of: twiddle factor [ PR₈₀C₁PR₈₀ C₂PR₈₀]Or [ PR ]₁₆₀C₁PR₈₀]Or [ PR ]₈₀C₁PR₁₆₀]. Wherein, PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]，PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]，C_iBelonging to twiddle factor candidate value [ 1-1 j-j]。C_iPR₈₀Means each PR₈₀Twiddle factor of C_i，C_iPR₁₆₀Means each PR₁₆₀Twiddle factor of C_iHere, C_iMay be 1, -1, j, or-j. The optimal twiddle factors as shown in tables 11-5 below were obtained by computer search:

tables 11 to 5

Specifically, for 29 cases in Table 11-1, the sum of the PAPRs of the L-STF and the L-LTF obtained for each twiddle factor sequence obtained by computer search is calculated, and the maximum value of the sum of the PAPRs of the L-STF and the L-LTF in the 29 cases (i.e., the sum of the PAPRs of the L-STF and the L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. the sequence shown in table 11-5. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence is the sum of the PAPRs of the L-STF and the L-LTF when the sequence is adopted by the Case2/Case4/Case6, specifically, the PAPR of the L-STF is 7.6524, and the PAPR of the L-LTF is 8.7288.

240MHz, consider the full bandwidth and preamble puncturing case, and are not compatible with PAPR characteristics of 160MHz and 80 MHz. Specifically, when designing a twiddle factor sequence of X ═ 240MHz, several that can be considered are shown in table 12-1 below:

TABLE 12-1

Where 1 indicates that the 20MHz is not punctured and x indicates that the 20MHz is punctured.

In one implementation, the 240M bandwidth twiddle factor may begin with 4 twiddle factors of the existing 80M bandwidth, i.e., a sequence of twiddle factors [ PR ]₈₀ C₁ C₂ … C₈]Wherein PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]. In addition C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequence as shown in the following table 12-2 was obtained by computer search:

TABLE 12-2

Specifically, for 10 cases in Table 12-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 10 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 shown in table 12-2. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case4, specifically, the PAPR of the L-STF is 6.6907, and the PAPR of the L-LTF is 7.6521.

In yet another implementation, the sequence of twiddle factors [1C₁ C₂ … C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequences as shown in the following tables 12-3 were obtained by computer search:

tables 12 to 3

Specifically, for 10 cases in Table 12-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 10 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the optimal selection factor sequence, i.e., sequence 1 to sequence 8 shown in table 12-3. Wherein, the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequences 1, 3, 5 and 7 is the sum of the PAPRs of the L-STF and the L-LTF when the sequences 1, 3, 5 and 7 are adopted by the Case8, specifically, the PAPR of the L-STF is 6.2691, and the PAPR of the L-LTF is 7.3445; the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequences 2, 4, 6 and 8 is the sum of the PAPRs of the L-STF and the L-LTF when the sequences 2, 4, 6 and 8 are adopted by the Case10, specifically, the PAPR of the L-STF is 6.2691, and the PAPR of the L-LTF is 7.3445.

In yet another implementation, site compatibility of the existing 802.11ac and 802.11ax mandatory 160M bandwidths is considered, so the 240M bandwidth twiddle factor starts with 8 twiddle factors of the existing 160M bandwidth, i.e., a twiddle factor sequence [ PR ]₁₆₀C₁ C₂ … C₄]Wherein PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]In addition to C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The best rotation as shown in tables 12-4 below was obtained by computer searchConversion factor sequence:

tables 12 to 4

Specifically, for 10 cases in Table 12-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 10 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., sequence 1 and sequence 2 as shown in tables 12-4. Wherein, the maximum value of the sum of PAPRs of the L-STF and the L-LTF corresponding to the sequence 1 is the sum of PAPRs of the L-STF and the L-LTF when the sequence 1 is adopted by the Case1, specifically, the PAPR of the L-STF is 7.3775, and the PAPR of the L-LTF is 7.9883; the maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence 2 is the sum of the PAPRs of the L-STF and the L-LTF when the sequence 2 is adopted by the Case1, specifically, the PAPR of the L-STF is 7.3775, and the PAPR of the L-LTF is 7.9883.

In yet another implementation, the 240MHz twiddle factor sequence may also take into account an existing 160M bandwidth twiddle factor or an 80M bandwidth twiddle factor. Specifically, the sequence of 240MHz twiddle factors may be in the form of: a twiddle factor of [ PR₈₀C₁PR₈₀ C₂PR₈₀]Or [ PR ]₁₆₀ C₁PR₈₀]Or [ PR ]₈₀C₁PR₁₆₀]. Wherein, PR₁₆₀Is a twiddle factor of the existing 160M bandwidth [ 1-1-1-11-1-1-1]，PR₈₀A twiddle factor of 1-1-1-1 for the existing 80M bandwidth]，C_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequences as shown in tables 12-5 below were obtained by computer search:

tables 12 to 5

Specifically, for 10 cases in Table 12-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 10 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. the sequence shown in table 12-5. The maximum value of the sum of the PAPRs of the L-STF and the L-LTF corresponding to the sequence is the sum of the PAPRs of the L-STF and the L-LTF when the sequence is adopted by the Case2/Case4/Case6, specifically, the PAPR of the L-STF is 7.6524, and the PAPR of the L-LTF is 8.7288.

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂ … C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1]. The optimal twiddle factor sequences as shown in tables 12-6 below were obtained by computer search:

tables 12 to 6

Specifically, for 10 cases in Table 12-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 10 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. the sequence shown in tables 12-6.

Further, it is also contemplated that possible twiddle factor sequences may be employed according to the capabilities of other fields, such as L-SIG, as shown in tables 12-7 below:

tables 12 to 7

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂ … C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1]. The optimal twiddle factor sequences as shown in tables 12-8 below were obtained by computer search:

specifically, for 10 cases in Table 12-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 10 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. the sequence shown in tables 12-8.

Tables 12 to 8

Further, it is also contemplated that possible twiddle factor sequences may be employed according to the capabilities of other fields, such as L-SIG, as shown in tables 12-9 below:

tables 12 to 9

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂ … C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequences as shown in tables 12-10 below were obtained by computer search:

tables 12 to 10

Specifically, for 10 cases in Table 12-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 10 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e. the sequence shown in tables 12-10.

Further, it is also contemplated that possible twiddle factor sequences may be employed according to the capabilities of other fields, such as L-SIG, as shown in tables 12-11 below:

tables 12 to 11

In yet another implementation, the sequence of twiddle factors is [1C ]₁ C₂ … C₁₁]In which C is_iBelonging to twiddle factor candidate value [ 1-1 j-j]. The optimal twiddle factor sequences as shown in tables 12-12 below were obtained by computer search:

tables 12 to 12

Specifically, for 10 cases in Table 12-1, the sum of PAPRs of L-STF and L-LTF obtained by each twiddle factor sequence obtained by computer search is calculated respectively, and the maximum value of the sum of PAPRs of L-STF and L-LTF in the 10 cases (i.e. the sum of PAPRs of L-STF and L-LTF in the worst case) is taken; then, the MAX PAPR corresponding to each kind of twiddle factor sequence is compared, and the twiddle factor sequence corresponding to the minimum value in the MAX PAPR is obtained as the best selection factor sequence, i.e., the sequence shown in tables 12-12.

Further, it is also contemplated that possible twiddle factor sequences may be employed according to the capabilities of other fields, such as L-SIG, as shown in tables 12-13 below:

tables 12 to 13

It should be understood that the PAPR value of any one of the above twiddle factor sequences is not unique, that is, the PAPR shown above is one of the PAPR values of this twiddle factor sequence. When the parameters (e.g., puncturing scenario, fourier transform parameters, etc.) of the design sequence are different, the same twiddle factor sequence may have different PAPR values.

In this embodiment, the wireless communication device may generate and transmit a PPDU with an X MHz bandwidth greater than 160MHz, where the X MHz bandwidth includes n Y MHz, a part of or all fields of the PPDU are rotated by a twiddle factor sequence on the n Y MHz, the twiddle factor sequence includes n twiddle factors, and each Y MHz corresponds to one twiddle factor, so that a PAPR of the PPDU may be reduced by the twiddle factor sequence. In addition, when the X MHz is 240MHz and 320MHz, the PAPR of the PPDU can be further reduced by the twiddle factor sequence provided by the embodiment of the present application, so that the PAPR of part of or all fields of the PPDU is optimal.

While the solution provided in the embodiment of the present application is described above, it can be understood that, in order to implement the above functions, the PPDU transmission device (e.g., an AP or an STA) includes a hardware structure and/or a software module corresponding to each function. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the PPDU transmission device may be divided into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The functional modules can be realized in a hardware form, and can also be realized in a software functional module form. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. The following description will be given by taking the division of each functional module by corresponding functions as an example:

fig. 6 shows a possible structure of a PPDU transmission apparatus, where a PPDU transmission apparatus 600 includes: a generating unit 61 and a transmitting unit 62. Wherein, the generating unit 61 is configured to support the PPDU transmission apparatus to execute step S301 in the foregoing embodiment; the sending unit 62 is configured to support the PPDU transmission apparatus to perform step S302 in the foregoing embodiment. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 7 shows a possible structure of a PPDU transmission apparatus, where a PPDU transmission apparatus 700 includes: a receiving unit 71 and a processing unit 72. Wherein, the receiving unit 71 is configured to support the PPDU transmission apparatus to perform step S302 in the foregoing embodiment; the processing unit 72 is configured to support the PPDU transmission apparatus to perform step S303 in the above-described embodiment. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again. Fig. 8 is a structural diagram of possible product forms of a PPDU transmission device according to an embodiment of the present application.

As one possible product form, the PPDU transmission apparatus may be an information transmission device including a processor 82 and a transceiver 83; the processor 82 is configured to control and manage actions of the PPDU transmission apparatus, for example, to support the PPDU transmission apparatus to perform step S301 in the foregoing embodiments, and/or to perform other technical processes described herein; the transceiver 83 is configured to support the PPDU transmission apparatus to perform step S302 in the foregoing embodiment. Optionally, the PPDU transmission device may further include a memory 81.

As another possible product form, the PPDU transmission apparatus may be an information transmission single board, where the PPDU transmission single board includes a processor 82 and a transceiver 83; the processor 82 is configured to control and manage actions of the PPDU transmission apparatus, for example, to support the PPDU transmission apparatus to perform step S301 in the foregoing embodiments, and/or to perform other technical processes described herein; the transceiver 83 is configured to support the PPDU transmission apparatus to perform step S302 in the foregoing embodiment. Optionally, the PPDU transmission board may further include a memory 81.

As another possible product form, the PPDU transmission device is also implemented by a general-purpose processor, which is commonly referred to as a chip. The general purpose processor includes: processing circuitry 82 and communications interface 83; optionally, the general-purpose processor may also include a storage medium 81.

As another possible product form, the PPDU transmission device may also be implemented using the following: one or more Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuitry, or any combination of circuitry capable of performing the various functions described throughout this application.

The processor 82 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, transistor logic, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like. The bus 84 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.

Fig. 9 is a structural diagram of possible product forms of a PPDU transmission device according to an embodiment of the present application.

As one possible product form, the PPDU transmission apparatus may be an information transmission device including a processor 92 and a transceiver 93; the processor 92 is configured to control and manage actions of the PPDU transmission apparatus, for example, to support the PPDU transmission apparatus to perform step S303 in the foregoing embodiments, and/or to perform other technical processes described herein; the transceiver 93 is configured to support the PPDU transmission apparatus to perform step S302 in the foregoing embodiment. Optionally, the PPDU transmission device may further include a memory 91.

As another possible product form, the PPDU transmission apparatus may be an information transmission single board, where the PPDU transmission single board includes a processor 92 and a transceiver 93; the processor 92 is configured to control and manage actions of the PPDU transmission apparatus, for example, to support the PPDU transmission apparatus to perform step S303 in the foregoing embodiments, and/or to perform other technical processes described herein; the transceiver 93 is configured to support the PPDU transmission apparatus to perform step S302 in the foregoing embodiment. Optionally, the PPDU transmission board may further include a memory 91.

As another possible product form, the PPDU transmission device is also implemented by a general-purpose processor, which is commonly referred to as a chip. The general purpose processor includes: processing circuitry 92 and a communications interface 93; optionally, the general-purpose processor may also include a storage medium 91.

As another possible product form, the PPDU transmission device may also be implemented using the following: one or more FPGAs, PLDs, controllers, state machines, gated logic, discrete hardware components, any other suitable circuitry, or any combination of circuitry capable of performing the various functions described throughout this application.

The processor 92 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, transistor logic, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like. The bus 94 may be a PCI bus or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware associated with program instructions, where the program instructions may be stored in a computer-readable storage medium, and when executed, perform the steps including the method embodiments; and the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

On one hand, an embodiment of the present application further provides a readable storage medium, where a computer executes instructions are stored in the readable storage medium, and when one device (which may be a single chip, a controller, or the like) or a processor executes the steps in the PPDU transmission method provided in the present application.

In one aspect, embodiments of the present application further provide a computer program product, where the computer program product includes computer executable instructions, and the computer executable instructions are stored in a computer readable storage medium; the computer-executable instructions may be read by at least one processor of the device from a computer-readable storage medium, and execution of the computer-executable instructions by the at least one processor causes the device to perform the steps in the PPDU transmission method provided herein.

In this embodiment of the present application, the information processing apparatus may generate and transmit a PPDU with an X MHz bandwidth greater than 160MHz, where the X MHz bandwidth includes n Y MHz, a part of or all fields of the PPDU are rotated by a twiddle factor sequence on the n Y MHz, the twiddle factor sequence includes n twiddle factors, and each Y MHz corresponds to one twiddle factor, so that a PAPR of the PPDU may be reduced by the twiddle factor sequence. In addition, when the X MHz is 240MHz and 320MHz, the PAPR of the PPDU can be further reduced by the twiddle factor sequence provided by the embodiment of the present application, so that the PAPR of part of or all fields of the PPDU is optimal.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the division of the unit is only one logical function division, and other division may be implemented in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. The shown or discussed mutual coupling, direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on or transmitted over a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a read-only memory (ROM), or a Random Access Memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape, a magnetic disk, or an optical medium, such as a Digital Versatile Disk (DVD), or a semiconductor medium, such as a Solid State Disk (SSD).