Method and apparatus for signal processing in a wireless communication system

Patent metadata

Field	Value
Publication number	US-12349092-B2
Application number	US-202117925726-A
Country	US
Kind code	B2
Filing date	Jun 18, 2021
Priority date	Jun 19, 2020
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). The present disclosure provides a device in a wireless communication system and a method performed by the device. The method comprises: for a first transmitted signal transmitted by the device and a first received signal corresponding to the first transmitted signal and received by the device, compensating one of the first transmitted signal and the first received signal, according to a first synchronization delay part of a synchronization delay between a receiver and a transmitter of the device, wherein the first synchronization delay part is an integral multiple of a predefined baseband sampling interval of the device in the synchronization delay; determining a second synchronization delay part of the synchronization delay based on one of a collection of the first received signal and the compensated first transmitted signal and a collection of the first transmitted signal and the compensated first received signal, depending on which one of the first transmitted signal and the first received signal is compensated, wherein the second synchronization delay part is a fractional multiple of the predefined baseband sampling interval of the device in the synchronization delay.

First claim

The invention claimed is:

1. A method performed by a device in a wireless communication system, comprising:
for a first transmitted signal transmitted by the device and a first received signal corresponding to the first transmitted signal and received by the device, compensating one of the first transmitted signal and the first received signal, according to a first synchronization delay part of a synchronization delay between a receiver and a transmitter of the device, wherein the first synchronization delay part is an integral multiple of a predefined baseband sampling interval of the device in the synchronization delay;
determining a second synchronization delay part of the synchronization delay based on one of a collection of the first received signal and the compensated first transmitted signal and a collection of the first transmitted signal and the compensated first received signal, depending on which one of the first transmitted signal and the first received signal is compensated, wherein the second synchronization delay part is a fractional multiple of the predefined baseband sampling interval of the device in the synchronization delay.

2. The method of claim 1 , wherein the step of determining the second synchronization delay part comprises:
generating a first plurality of time-domain synchronization sequences based on one of the first transmitted signal and the compensated first transmitted signal, depending on which one of the first transmitted signal and the first received signal is compensated;
determining the second synchronization delay part based on the first plurality of time-domain synchronization sequences and one of the first received signal and the compensated first received signal, depending on which one of the first transmitted signal and the first received signal is compensated.

3. The method of claim 2 , wherein the step of generating the first plurality of time-domain synchronization sequences comprises:
generating the first plurality of time-domain synchronization sequences by performing time-domain interpolation on one of the first transmitted signal and the compensated first transmitted signal, depending on which one of the first transmitted signal and the first received signal is compensated.

4. The method of claim 2 , wherein the step of generating the first plurality of time-domain synchronization sequences comprises:
generating the first plurality of time-domain synchronization sequences by adding frequency-domain linear phases to one of the first transmitted signal and the compensated first transmitted signal, depending on which one of the first transmitted signal and the first received signal is compensated.

5. The method of claim 1 , wherein the first transmitted signal is determined by one of the following steps:
concatenating a plurality of time-domain sequences to form the first transmitted signal; and
concatenating at least two consecutive time-domain symbols in time-domain signals transmitted by the device to form the first transmitted signal.

6. The method of claim 2 , wherein the step of determining the second synchronization delay part comprises:
taking the first plurality of time-domain synchronization sequences as a second plurality of time-domain synchronization sequences, or selecting the second plurality of time-domain synchronization sequences from the first plurality of time-domain synchronization sequences through a coarse synchronization process; and,
determining the second synchronization delay part based on the second plurality of time-domain synchronization sequences and one of the first received signal and the compensated first received signal, depending on which one of the first transmitted signal and the first received signal is compensated.

7. The method of claim 6 , wherein the coarse synchronization process comprises:
extracting R groups of sequences at an interval of R from one time-domain symbol of a signal obtained by oversampling one of the first received signal and the compensated first received signal at a predefined oversampling rate R, depending on which one of the first transmitted signal and the first received signal is compensated;
determining a coarse synchronization result according to the indexes of a group of sequences having correlation peak values with one of the first transmitted signal and the compensated first transmitted signal among the R groups of sequences, depending on which one of the first transmitted signal and the first received signal is compensated.

8. The method of claim 7 , wherein selecting the second plurality of time-domain synchronization sequences from a first plurality of time-domain synchronization sequences through the coarse synchronization process comprises one of the following steps:
based on the coarse synchronization result, determining a group of time-domain synchronization sequences from R groups of time-domain synchronization sequences obtained by dividing the first plurality of time-domain synchronization sequences according to R, and compensating the determined group of time-domain synchronization sequences based on the coarse synchronization result as the second plurality of time-domain synchronization sequences; and
based on the coarse synchronization result, determining a first group of time-domain synchronization sequences from R groups of time-domain synchronization sequences obtained by dividing the first plurality of time-domain synchronization sequences according to R, and taking the first group of time-domain synchronization sequences as the second plurality of time-domain synchronization sequences.

9. The method of claim 8 , wherein the step of determining the second synchronization delay part based on the second plurality of time-domain synchronization sequences and one of the first received signal and the compensated first received signal, depending on which one of the first transmitted signal and the first received signal is compensated comprises one of the followings:
in case that the second plurality of time-domain synchronization sequences have been compensated based on the coarse synchronization result, depending on which one of the first transmitted signal and the first received signal is compensated, determining the second synchronization time delay part according to one time-domain synchronization sequence which has a largest correlation peak value with one of the first received signal and the compensated first received signal among the second time-domain synchronization sequences;
in case that the second plurality of time-domain synchronization sequences are not compensated based on the coarse synchronization result, depending on which one of the first transmitted signal and the first received signal is compensated, determining the second synchronization delay part according to one time-domain synchronization sequence having a correlation peak value with a signal obtained by compensating one of the first received signal and the compensated first received signal based on the coarse synchronization result among the second time-domain synchronization sequences.

10. The method of claim 8 , wherein the step of determining the second synchronization delay part based on the second plurality of time-domain synchronization sequences and one of the first received signal and the compensated first received signal, depending on which one of the first transmitted signal and the first received signal is compensated comprises:
determining channel estimation matrices corresponding to each time-domain synchronization sequence of the second plurality of time-domain synchronization sequences;
determining a residual self-interference caused by the second synchronization delay part corresponding

Assignees

• Samsung Electronics Co Ltd

Inventors

• Su Di
• Qian Chen
• Lin Peng
• Yu Bin

Classifications

• H04L27/2691 Primary

  involving interference determination or cancellation · CPC title

• H04L27/2663

  Coarse synchronisation, e.g. by correlation · CPC title

• H04W56/005

  compensating for timing error by adjustment in the receiver · CPC title

• H04B1/525

  with means for reducing leakage of transmitter signal into the receiver · CPC title

• H04L7/007

  detection of error based on maximum signal power, e.g. peak value, maximizing autocorrelation · CPC title