阅读说明：本技术 自动增益控制符号用于解码的部分用途 (Partial use of automatic gain control symbols for decoding ) 是由 文森特·皮埃尔·马蒂内斯 于 2019-06-27 设计创作，主要内容包括：一种涉及自动增益控制符号用于解码的部分用途的方法,包括：接收具有多个符号的数据子帧；确定所述数据子帧中无效伪时域样本的位置；以及丢弃无效伪时域样本并恢复有效伪时域样本以产生更新后数据子帧；以及处理所述更新后数据子帧以产生经解调数据。(A method involving partial use of automatic gain control symbols for decoding, comprising: receiving a data subframe having a plurality of symbols; determining a position of an invalid pseudo-time domain sample in the data subframe; discarding the invalid pseudo-time domain samples and recovering the valid pseudo-time domain samples to generate updated data subframes; and processing the updated data subframe to produce demodulated data.)

1. A method, comprising:

receiving a data subframe (200) having a plurality of symbols;

determining positions of invalid pseudo time-domain samples in the data sub-frame (200); and

discarding the invalid pseudo-frequency domain signal samples and recovering the valid pseudo-frequency domain samples to generate updated data subframes; and

processing the updated data subframe to generate demodulated data.

2. The method according to claim 1, wherein the invalid pseudo-time-domain samples are generated based on an electromagnetic perturbation performed on the sub-frame (200).

3. The method of claim 1 or claim 2, wherein a symbol of the plurality of symbols is a single-carrier frequency division multiple access, SC-FDMA (375), symbol.

4. The method according to any of the preceding claims, wherein the discarded pseudo time domain samples are placed in a first part of a first symbol (210, 610, 810) of a received data subframe (200).

5. The method according to any of the preceding claims, wherein the recovered pseudo time domain samples are placed in a second part of a first symbol (210, 610, 810) of the received data subframe (200).

6. The method of any preceding claim, wherein discarding the invalid pseudo-time-domain samples comprises zeroing out the invalid pseudo-time-domain samples.

7. The method of any preceding claim, wherein the invalid pseudo-time-domain samples are generated during an electromagnetic perturbation settling time.

8. The method of any of the preceding claims, wherein the invalid pseudo time-domain samples are generated during a settling time of an Automatic Gain Controller (AGC) (410).

9. A demodulator device, comprising:

an automatic gain controller, AGC, (410) for scaling a received signal having a plurality of sub-frames (200);

a Fast Fourier Transform (FFT) (425) for transforming the received signal to a frequency domain;

a physical sidelink channel (455) for decoding frequency domain signals, the physical sidelink channel (455) comprising an inverse fourier transform (IDFT) (422) for transforming a data subframe (200) to the time domain and a symbol controller (435) configured to determine the locations of invalid pseudo time domain samples in the subframe and to output an updated data subframe, wherein the physical sidelink channel (455) further processes the updated data subframe to produce demodulated data.

10. The demodulator device of claim 9, wherein the symbol controller (435) discards the invalid pseudo-frequency-domain signal samples and recovers valid pseudo-frequency-domain samples to produce the updated data sub-frame.

Technical Field

Embodiments disclosed herein relate generally to communications, and more specifically to techniques for using Automatic Gain Control (AGC) symbols at a receiver in a wireless communication network.

Background

Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, information transfer, and broadcast. These wireless networks may be capable of supporting communication for multiple users by sharing the available network resources. Examples of such wireless networks include those that may be used for third generation partnership project (3GPP) cellular vehicle-to-all (C-V2X), long term evolution release 14(LTE Rel-14), long term evolution release 15(LTE Rel-15), and fifth generation new radios (5G NR V2X).

Disclosure of Invention

The following presents a simplified summary of various embodiments. Some simplifications and omissions may be made in the following summary, which is intended to highlight and introduce some aspects of the various embodiments, and not to limit the scope of the invention. A detailed description of embodiments sufficient to enable those of ordinary skill in the art to make and use the inventive concepts will be presented in later sections.

Embodiments described herein include a method comprising: receiving a data subframe having a plurality of symbols; determining a position of an invalid pseudo-time domain sample in the data subframe; discarding the invalid pseudo-time domain samples and recovering the valid pseudo-time domain samples to generate updated data subframes; and processing the updated data subframe to produce demodulated data.

The invalid pseudo-time domain samples may be generated based on an electromagnetic perturbation performed on the subframe.

The plurality of symbols may be single-carrier frequency division multiple access (SC-FDMA) symbols.

The discarded pseudo-time domain IQ samples may be placed in a first portion of a first symbol of a received data subframe.

The recovered pseudo time-domain samples may be placed in a second portion of a first symbol of the received data subframe.

Discarding corrupted pseudo-time-domain samples may include zeroing out the corrupted pseudo-time-domain samples.

The invalid pseudo-time domain samples may be generated during an electromagnetic perturbation settling time

The invalid pseudo time domain samples may be generated during a settling time of the AGC.

Drawings

Other objects and features of the present invention will become more fully apparent from the following detailed description and appended claims, taken in conjunction with the accompanying drawings. While several embodiments are illustrated and described, like reference numerals designate like parts in the various drawings, in which:

FIG. 1 illustrates a Vehicle to Everything (V2X) network according to embodiments described herein;

fig. 2 illustrates a sub-link data subframe according to embodiments described herein;

FIG. 3 shows a block diagram of a design of an OFDM modulator and an SC-FDMA modulator according to embodiments described herein;

fig. 4 illustrates a decoding chain according to embodiments described herein.

Fig. 5 to 7 show decoded representations of codewords of a psch data channel according to embodiments described herein;

fig. 8-10 illustrate a case where a first symbol is not fully available to a receiver due to AGC calibration running, according to embodiments described herein; and is

Fig. 11 illustrates an index conversion according to embodiments described herein.

Embodiments may also include a demodulator device comprising: an Automatic Gain Controller (AGC) for scaling a received signal having a plurality of subframes; a Fast Fourier Transform (FFT) for transforming the received signal to a frequency domain; a physical sidelink channel for decoding a frequency domain signal, the physical sidelink channel comprising an Inverse Discrete Fourier Transform (IDFT) for transforming a subframe of data to a time domain and a symbol controller configured to determine locations of invalid pseudo-time domain samples in the subframe and to output an updated subframe of data, wherein the physical sidelink channel further processes the updated subframe of data to produce demodulated data.

The symbol controller may discard the invalid pseudo-frequency-domain samples and restore valid pseudo-frequency-domain samples to produce the updated data subframe. AGC can generate the invalid pseudo time-domain samples for the subframe. The plurality of subframes may include single carrier frequency division multiple access (SC-FDMA) symbols.

The discarded pseudo-time domain samples may be placed in a first portion of a first symbol of a received data subframe. The recovered pseudo time-domain samples may be placed in a second portion of a first symbol of the received data subframe. The symbol controller may discard the corrupted pseudo-time-domain samples, including zeroing out the corrupted pseudo-time-domain samples.