阅读说明：本技术 一种半导体载波通信芯片及数据传输系统 (Semiconductor carrier communication chip and data transmission system ) 是由 谢东新 郭哲 王立华 王朝伟 于 2020-04-22 设计创作，主要内容包括：本发明提供一种半导体载波通信芯片及数据传输系统,涉及宽带载波通信领域,所述芯片包括用于采集二进制数据流信号的数据采集接口；与数据采集接口电连接,用于对二进制数据流信号进行前向纠错的MCU；与MCU电连接,用于对二进制数据流信息进行调制、解调的OFDM调制解调模块；与OFDM调制解调模块电连接,用于将调制后的二进制数据流信号传输至载波传输线或者将解调后的二进制数据流信号传输至译码器的耦合输出输入模块。本发明使得二进制数据流信号不仅限于电力线上的传输,还可以在任意一对差分线(例如双绞线、同轴电缆、直流电线、交流电线等)上传输,并且信号传输稳定性好,无需进行重新布线,便于进行升级改造。(The invention provides a semiconductor carrier communication chip and a data transmission system, which relate to the field of broadband carrier communication, wherein the chip comprises a data acquisition interface for acquiring binary data stream signals; the MCU is electrically connected with the data acquisition interface and is used for carrying out forward error correction on the binary data stream signal; the OFDM modulation and demodulation module is electrically connected with the MCU and used for modulating and demodulating binary data stream information; and the coupling output input module is electrically connected with the OFDM modulation and demodulation module and is used for transmitting the modulated binary data stream signal to a carrier transmission line or transmitting the demodulated binary data stream signal to a decoder. The invention ensures that the binary data stream signal is not only transmitted on the power line, but also transmitted on any pair of differential lines (such as twisted pair, coaxial cable, direct current wire, alternating current wire and the like), and the signal transmission stability is good, the rewiring is not needed, and the upgrading and the reconstruction are convenient.)

1. A semiconductor carrier communication chip, characterized by: the system comprises a data acquisition interface for acquiring binary data stream signals; the MCU is electrically connected with the data acquisition interface and is used for carrying out forward error correction on the binary data stream signal; the OFDM modulation and demodulation module is electrically connected with the MCU and used for modulating and demodulating binary data stream signals; and the coupling output input module is electrically connected with the OFDM modulation and demodulation module and is used for transmitting the modulated binary data stream signal to a carrier transmission line or transmitting the demodulated binary data stream signal to a decoder.

2. A semiconductor carrier communication chip as defined in claim 1, wherein: the data acquisition interface comprises a network interface, a GPIO interface and a serial interface.

3. A semiconductor carrier communication chip as defined in claim 1, wherein: the carrier transmission line is a power line or a differential line.

4. A semiconductor carrier communication chip as defined in claim 1, wherein: the process of the OFDM modulation of the binary data stream signal by the OFDM modulation and demodulation module comprises the following steps:

s1.1: dividing an original channel into a plurality of orthogonal sub-channels, converting a high-speed serial binary data stream signal into a plurality of low-speed parallel data stream sub-signals, and distributing the plurality of data stream sub-signals to the plurality of orthogonal sub-channels;

s1.2: each data stream sub-signal is modulated and mapped corresponding to a carrier, and the data stream sub-signals after modulation and mapping are subjected to IFFT processing;

s1.3: converting a plurality of low-speed parallel data stream sub-signals into high-speed serial binary data stream signals, and inserting guard intervals into the binary data stream signals.

5. A semiconductor carrier communication chip as defined in claim 4, wherein: the process of the OFDM modulation and demodulation module for carrying out OFDM demodulation on the binary data stream signal comprises the following steps:

s2.1: removing a guard interval from the binary data stream signal, converting the high-speed serial binary data stream signal into a plurality of low-speed parallel data stream sub-signals, and distributing the data stream sub-signals into sub-channels;

s2.2: carrying out FFT processing on a plurality of low-speed parallel data stream sub-signals, and carrying out demodulation processing on a plurality of low-speed parallel data stream sub-signals;

s2.3: and converting a plurality of low-speed parallel data stream sub-signals into high-speed serial binary data stream signals.

6. A data transmission system, characterized by: the system comprises a plurality of semiconductor carrier communication chips according to any one of claims 1 to 5, wherein the plurality of semiconductor carrier communication chips comprise a main carrier communication chip and a plurality of sub-carrier communication chips, and the main carrier communication chip and the sub-carrier communication chips are connected to a carrier transmission line in parallel for data transmission.

7. A data transmission system according to claim 6, characterized in that: before the system performs data transmission, networking is required, and the networking process comprises the following steps:

(1) setting a main carrier communication chip as a DHCP host server, and accessing a carrier transmission line after setting an IP address;

(2) the subcarrier communication chip is parallelly accessed to the carrier transmission line and sends ODFM synchronous information to the DHCP host server;

(3) the DHCP host server receives the ODFM synchronous information for identification and sends feedback information to the subcarrier communication chip;

(4) after receiving the feedback information, the subcarrier communication chip determines the frequency range output by the channel of the subcarrier communication chip and sends the IP address request to the DHCP host server again;

(5) and the DHCP host server allocates an IP address to the subcarrier communication chip to complete networking.

Technical Field

The invention relates to the field of broadband carrier communication, in particular to a semiconductor carrier communication chip and a data transmission system.

Background

In the prior art, the internet of things/internet technology is widely applied to daily life of people, for example, an intelligent street lamp remote control system, a visual building intercom system, an outdoor security video transmission system and the like, so that great convenience and efficiency are provided for people.

In the data transmission of data, voice, video, and the like, the data transmission is generally implemented based on a wireless communication technology, a network wiring technology, a power line carrier communication technology, and the like. The wireless communication transmission (including WIFI, LORA and the like) has the defect of poor data transmission stability; the network wiring needs to be wired, and the defect of difficult upgrading and reconstruction exists; the Power Line Communication technology (PLC) is a Communication technology that uses a Power Line as an information transmission medium to transmit data, and Power Line carrier Communication transmission does not require wiring, so that upgrading and reconstruction are easy, and the Power Line carrier Communication technology has the advantages of good stability, low system investment, short construction period and the like; however, the conventional power line carrier communication can only realize data transmission based on a power line, and cannot perform data transmission based on a twisted pair, a coaxial cable, a direct current wire, an alternating current wire and the like, so that the application range of data transmission is limited.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a semiconductor carrier communication chip and a data transmission system, which enable binary data stream signals to be transmitted not only on power lines but also on any pair of differential lines (e.g., twisted pair, coaxial cable, dc line, ac line, etc.), and have good signal transmission stability, and are convenient for upgrading and reconstruction without rewiring.

To achieve the above and other related objects, the present invention provides a semiconductor carrier communication chip, including a data acquisition interface for acquiring a binary data stream signal; the MCU is electrically connected with the data acquisition interface and is used for carrying out forward error correction on the binary data stream signal; the OFDM modulation and demodulation module is electrically connected with the MCU and used for modulating and demodulating binary data stream signals; and the coupling output input module is electrically connected with the OFDM modulation and demodulation module and is used for transmitting the modulated binary data stream signal to a carrier transmission line or transmitting the demodulated binary data stream signal to a decoder.

In an embodiment of the present invention, the data acquisition interface includes a network interface, a GPIO interface, and a serial interface.

In an embodiment of the invention, the carrier transmission line is a power line or a differential line.

In an embodiment of the present invention, the process of the OFDM modulation and demodulation module performing OFDM modulation on the binary data stream signal includes:

s1.1: dividing an original channel into a plurality of orthogonal sub-channels, converting a high-speed serial binary data stream signal into a plurality of low-speed parallel data stream sub-signals, and distributing the plurality of data stream sub-signals to the plurality of orthogonal sub-channels;

s1.2: each data stream sub-signal is modulated and mapped corresponding to a carrier, and the data stream sub-signals after modulation and mapping are subjected to IFFT processing;

s1.3: converting a plurality of low-speed parallel data stream sub-signals into high-speed serial binary data stream signals, and inserting guard intervals into the binary data stream signals.

In an embodiment of the present invention, the process of the OFDM modulation and demodulation module performing OFDM demodulation on the binary data stream signal includes:

s2.1: removing a guard interval from the binary data stream signal, converting the high-speed serial binary data stream signal into a plurality of low-speed parallel data stream sub-signals, and distributing the data stream sub-signals into sub-channels;

s2.2: carrying out FFT processing on a plurality of low-speed parallel data stream sub-signals, and carrying out demodulation processing on a plurality of low-speed parallel data stream sub-signals;

s2.3: and converting a plurality of low-speed parallel data stream sub-signals into high-speed serial binary data stream signals.

A data transmission system comprises a plurality of semiconductor carrier communication chips, wherein the semiconductor carrier communication chips comprise a main carrier communication chip and a plurality of subcarrier communication chips, and the main carrier communication chip and the subcarrier communication chips are accessed to a carrier transmission line in parallel to perform data transmission.

In an embodiment of the present invention, before the system performs data transmission, networking needs to be performed, where the networking process is as follows:

(1) setting a main carrier communication chip as a DHCP host server, and accessing a carrier transmission line after setting an IP address;

(2) the subcarrier communication chip is parallelly accessed to the carrier transmission line and sends ODFM synchronous information to the DHCP host server;

(3) the DHCP host server receives the ODFM synchronous information for identification and sends feedback information to the subcarrier communication chip;

(4) after receiving the feedback information, the subcarrier communication chip determines the frequency range output by the channel of the subcarrier communication chip and sends the IP address request to the DHCP host server again;

(5) and the DHCP host server allocates an IP address to the subcarrier communication chip to complete networking.

As described above, the semiconductor carrier communication chip and the data transmission system according to the present invention have the following advantages:

1. the invention ensures that the binary data stream signal is not only transmitted on the power line, but also transmitted on any pair of differential lines (such as twisted pair, coaxial cable, direct current wire, alternating current wire and the like), and the signal transmission stability is good, the rewiring is not needed, and the upgrading and the reconstruction are convenient.

2. The invention adopts the orthogonal frequency division multiplexing technology and the fast Fourier transform technology to carry out OFDM modulation and OFDM demodulation processing on the binary data stream signal, thereby reducing the error rate and the operation complexity.

Drawings

Fig. 1 is a block diagram showing a structure of a semiconductor carrier communication chip disclosed in an embodiment of the present invention.

Fig. 2 is a schematic diagram illustrating an operation of the semiconductor carrier communication chip disclosed in the embodiment of the present invention.

Fig. 3 shows a flow chart of OFDM modulation disclosed in the embodiments of the present invention.

Fig. 4 shows a flowchart of OFDM demodulation disclosed in the embodiment of the present invention.

Fig. 5 is a block diagram showing a structure of a data transmission system disclosed in the embodiment of the present invention.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

Referring to fig. 1, the present invention provides a semiconductor carrier communication chip, including a data acquisition interface for acquiring a binary data stream signal, where the data acquisition interface includes peripheral interfaces such as a network interface, a GPIO interface, and a serial interface; the MCU is electrically connected with the data acquisition interface and is used for carrying out forward error correction on binary data stream signals, and the MCU integrates an MAC module (used for IP address management) and a TCP/IP protocol stack; the OFDM modulation and demodulation module is electrically connected with the MCU and is used for carrying out OFDM modulation and OFDM demodulation on binary data stream signals; the coupling output input module is electrically connected with the OFDM modulation and demodulation module and is used for transmitting the modulated binary data stream signal to a carrier transmission line or transmitting the demodulated binary data stream signal to a decoder; the carrier transmission line is a power line or a differential line.

The OFDM (Orthogonal Frequency Division Multiplexing) is actually one of multi-carrier modulation, and realizes parallel output of high-speed serial binary data stream signals through Frequency Division Multiplexing, and has a good multi-path anti-aging capability.

Referring to fig. 2, the present invention first collects binary data stream signals through a data collection interface; then outputting the binary data stream signal to the MCU for Forward Error Correction (FEC); finally, binary data stream signals are transmitted to an OFDM modulation and demodulation module for OFDM modulation and then are output to a carrier transmission line through a coupling output and input module; meanwhile, the binary data stream signal can be output through a decoder after OFDM demodulation is carried out through the OFDM modulation and demodulation module.

Referring to fig. 3, the process of the OFDM modulation and demodulation module performing OFDM modulation on the binary data stream signal includes:

s1.1: dividing an original channel into a plurality of orthogonal sub-channels, converting a high-speed serial binary data stream signal into a plurality of low-speed parallel data stream sub-signals comprising X (0), X (1) … … X (n), and distributing the plurality of data stream sub-signals into the plurality of orthogonal sub-channels;

s1.2: each data stream sub-signal is modulated and mapped corresponding to a carrier, and the data stream sub-signals after modulation and mapping are subjected to IFFT processing;

s1.3: converting a plurality of low-speed parallel data stream sub-signals into high-speed serial binary data stream signals, and inserting guard intervals into the binary data stream signals.

Referring to fig. 4, the process of the OFDM modulation and demodulation module performing OFDM demodulation on the binary data stream signal includes:

s2.1: removing guard intervals from the binary data stream signal, converting the high-speed serial binary data stream signal into a plurality of low-speed parallel data stream sub-signals comprising Y (0), Y (1) … … Y (n), and distributing the data stream sub-signals into sub-channels;

s2.2: carrying out FFT processing on a plurality of low-speed parallel data stream sub-signals, and carrying out demodulation processing on a plurality of low-speed parallel data stream sub-signals;

s2.3: and converting a plurality of low-speed parallel data stream sub-signals into high-speed serial binary data stream signals.

The OFDM demodulation method mainly includes the steps that an original channel is divided into a plurality of orthogonal sub-channels, when OFDM demodulation is carried out, high-speed serial binary data stream signals are converted into low-speed parallel data stream sub-signals, and the data stream sub-signals are adjusted to each sub-channel to be transmitted; the signal width of the sub-channel is smaller than that of the original channel, so that each sub-channel is flat fading, and intersymbol interference can be eliminated; and since the bandwidth of each subchannel is only a small fraction of the original channel bandwidth, subchannel equalization becomes relatively easy.

The existing modulation mapping is carried out on a single carrier, and the modulation method of the single carrier is easy to generate intersymbol interference to increase the bit error rate, so that the invention converts a high-speed serial binary data stream signal into a plurality of low-speed parallel data stream sub-signals, and each low-speed data stream sub-signal is modulated corresponding to one carrier to form a multi-carrier simultaneous modulation parallel transmission system, namely the defects are overcome.

In addition, because of inserting the guard interval, under the condition that the guard interval is greater than the maximum multipath delay spread, the intersymbol interference caused by multipath can be eliminated to the maximum extent, if the cyclic prefix is used as the guard interval, the interference between sub-channels caused by multipath can be avoided; in addition, the orthogonal carrier can realize modulation and demodulation by using fast Fourier transform (FFT/IFFT), and the operation complexity can be obviously reduced.

Referring to fig. 5, the present invention provides a data transmission system, which includes a plurality of semiconductor carrier communication chips, respectively a semiconductor carrier communication chip 1, a semiconductor carrier communication chip 2 … …, a semiconductor carrier communication chip n, and a semiconductor carrier communication chip n +1, where the plurality of semiconductor carrier communication chips include a main carrier communication chip and a plurality of sub-carrier communication chips, and the main carrier communication chip and the plurality of sub-carrier communication chips are connected to a carrier transmission line in parallel for data transmission.

Before the system performs data transmission, networking is required, and the networking process comprises the following steps:

(1) setting a main carrier communication chip as a DHCP host server, and accessing a carrier transmission line after setting an IP address;

(2) the subcarrier communication chip is parallelly accessed to the carrier transmission line and sends ODFM synchronous information to the DHCP host server;

(3) the DHCP host server receives the ODFM synchronous information for identification and sends feedback information to the subcarrier communication chip;

(4) after receiving the feedback information, the subcarrier communication chip determines the frequency range output by the channel of the subcarrier communication chip and sends the IP address request to the DHCP host server again;

(5) and the DHCP host server allocates an IP address to the subcarrier communication chip to complete networking.

In summary, the present invention enables the binary data stream signal to be transmitted not only on the power line, but also on any pair of differential lines (e.g. twisted pair, coaxial cable, dc wire, ac wire, etc.), and the signal transmission stability is good, and the signal transmission does not need to be rewired, thereby facilitating upgrading and reconstruction; and the OFDM modulation and the OFDM demodulation are carried out on the binary data stream signal by adopting the fast Fourier transform of the OFDM technology, so that the error rate can be reduced, and the operation complexity can be reduced. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.