US 12,219,042 B2
Signal sampling method and apparatus, and optical receiver
Guohua Gu, Guangdong (CN); Yangzhong Yao, Guangdong (CN); Nanshan Cao, Guangdong (CN); and Chungui Tao, Guangdong (CN)
Assigned to SANECHIPS TECHNOLOGY CO., LTD., Shenzhen (CN)
Appl. No. 17/642,949
Filed by ZTE CORPORATION, Guangdong (CN)
PCT Filed Sep. 23, 2020, PCT No. PCT/CN2020/116969
§ 371(c)(1), (2) Date Mar. 14, 2022,
PCT Pub. No. WO2021/063219, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 201910944543.1 (CN), filed on Sep. 30, 2019.
Prior Publication US 2022/0407678 A1, Dec. 22, 2022
Int. Cl. H04L 7/04 (2006.01); H03M 1/06 (2006.01); H03M 1/12 (2006.01); H04L 7/00 (2006.01); H04L 7/027 (2006.01)
CPC H04L 7/042 (2013.01) [H03M 1/0617 (2013.01); H03M 1/1245 (2013.01); H04L 7/0029 (2013.01); H04L 7/027 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A signal sampling method, comprising:
sampling a burst signal according to a first sampling frequency to obtain a first sampling signal;
sampling a preamble signal in the first sampling signal according to a second sampling frequency to obtain a second sampling signal;
determining a phase difference between the burst signal and a local sampling clock corresponding to the first sampling frequency according to the second sampling signal; and
interpolating the first sampling signal according to the phase difference to obtain a target sampling signal;
wherein determining the phase difference between the burst signal and the local sampling clock corresponding to the first sampling frequency according to the second sampling signal comprises:
performing symbol decision on the second sampling signal to obtain a decision signal;
determining an error signal of the second sampling signal and the decision signal; and
determining the phase difference between the burst signal and the local sampling clock corresponding to the first sampling frequency according to the error signal.