Message Passing-Based Joint Channel Estimation and Signal Detection for OTFS With Superimposed Pilots

被引:0
作者
Huang, Fupeng [1 ,2 ,3 ]
Guo, Qinghua [4 ]
Zhang, Youwen [1 ,2 ,3 ,5 ]
Zakharov, Yuriy V. [6 ]
机构
[1] Harbin Engn Univ, Natl Key Lab Underwater Acoust Technol, Harbin 150001, Peoples R China
[2] Harbin Engn Univ, Key Lab Marine Informat Acquisit & Secur, Minist Ind & Informat Technol, Harbin 150001, Peoples R China
[3] Harbin Engn Univ, Coll Underwater Acoust Engn, Harbin 150001, Peoples R China
[4] Univ Wollongong, Sch Elect Comp & Telecommun Engn, Wollongong, NSW 2522, Australia
[5] Jiangsu Univ Sci & Technol, Ocean Coll, Zhenjiang 212100, Peoples R China
[6] Univ York, Sch Phys Engn & Technol, York YO10 5DD, England
基金
英国工程与自然科学研究理事会;
关键词
Receivers; Manganese; Detectors; Symbols; Signal detection; Message passing; Channel estimation; Basis extension modeling; channel estimation; message passing; orthogonal time frequency space; superimposed pilots; BELIEF PROPAGATION; MEAN-FIELD; SYSTEMS;
D O I
10.1109/TVT.2024.3378833
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Receivers with joint channel estimation (CE) and signal detection using superimposed pilots (SP) can achieve high transmission efficiency in orthogonal time frequency space (OTFS) systems. However, existing receivers have high computational complexity, hindering their practical applications. In this work, with SP in the delay-Doppler (DD) domain and the generalized complex exponential (GCE) basis expansion modeling (BEM) for channels, a message passing-based SP-DD iterative receiver is proposed, which drastically reduces the computational complexity while with marginal performance loss, compared to existing ones. To facilitate CE in the proposed receiver, we design pilot signal to achieve pilot power concentration in the frequency domain, thereby developing an SP-DD-D receiver that can reduce the power of the pilot signal with almost no loss of CE and bit error rate (BER) performance. Extensive simulation results are provided to demonstrate the superiority of the proposed SP-DD-D receiver.
引用
收藏
页码:11531 / 11542
页数:12
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