US 11,943,081 B2
Method of receiving a transmitted signal over a time-varying channel and receiver thereof
Xiaobei Liu, Singapore (SG); Kushal Anand, Singapore (SG); Yong Liang Guan, Singapore (SG); and Pingzhi Fan, Sichuan (CN)
Assigned to Nanyang Technological University, Singapore (SG); and Southwest Jiaotong University, Sichuan (CN)
Appl. No. 17/770,984
Filed by NANYANG TECHNOLOGICAL UNIVERSITY, Singapore (SG); and SOUTHWEST JIAOTONG UNIVERSITY, Sichuan (CN)
PCT Filed Oct. 22, 2020, PCT No. PCT/SG2020/050605
§ 371(c)(1), (2) Date Apr. 21, 2022,
PCT Pub. No. WO2021/080510, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 10201909843V (SG), filed on Oct. 22, 2019.
Prior Publication US 2022/0368569 A1, Nov. 17, 2022
Int. Cl. H04L 25/02 (2006.01); H04L 25/03 (2006.01)
CPC H04L 25/0224 (2013.01) [H04L 25/022 (2013.01); H04L 25/03292 (2013.01); H04L 2025/03433 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of receiving a transmitted signal over a time-varying channel, the method comprising:
obtaining a received symbol signal in frequency domain based on the transmitted signal;
performing a first channel estimation with respect to the time-varying channel based on the received symbol signal to obtain a plurality of first estimated basis expansion model (BEM) coefficients, the time-varying channel being modeled based on a complex-exponential basis expansion model (CX-BEM);
performing a first equalization based on the received symbol signal and the plurality of first estimated BEM coefficients to obtain a plurality of first detected source symbols; and
performing one or more rounds of a second channel estimation and a second equalization, each round comprising:
performing the second channel estimation with respect to the time-varying channel based on the received symbol signal and a plurality of detected source symbols to obtain a plurality of second estimated BEM coefficients;
performing interference removal based on the received symbol signal, the plurality of detected source symbols and the plurality of second estimated BEM coefficients to obtain an interference reduced symbol signal in frequency domain; and
performing the second equalization based on the interference reduced symbol signal and the plurality of second estimated BEM coefficients to obtain a plurality of second detected source symbols.