电讯技术2025，Vol.65Issue(2)：231-238,8.DOI:10.20079/j.issn.1001-893x.240401001
基于残差的正交时频空异步消息传递算法
An Orthogonal Time Frequency Space Asynchronous Message Passing Algorithm Based on Residuals
摘要
Abstract
As a promising modulation scheme,orthogonal time frequency space(OTFS)modulation can significantly improve the robustness of communication systems in high-mobility scenarios.The traditional OTFS synchronous message passing(MP)detection algorithm and its variants need to update and pass all the information every iteration,resulting in slow convergence speed.In order to solve above problems,an OTFS asynchronous message passing algorithm based on residuals is proposed.The algorithm uses the difference before and after the message update as the informed scheduling information to control the order of message delivery,so as to realize the non-uniform distribution of iterative resources.The simulation results show that compared with the traditional synchronous messaging algorithm,the residual-based OTFS asynchronous messaging algorithm reduces the number of iterations by 45%and improves the bit error performance by 7 dB when the signal-to-noise ratio is 20 dB.关键词
正交时频空(OTFS)/消息传递算法/残差置信度传播/知情调度/异步传播Key words
orthogonal time frequency space(OTFS)/message passing algorithm/residual belief propagation/informed scheduling/asynchronous propagation分类
电子信息工程引用本文复制引用
曾沁玥,刘林..基于残差的正交时频空异步消息传递算法[J].电讯技术,2025,65(2):231-238,8.基金项目
轨道交通工程信息化国家重点实验室(中铁一院)开放课题(SKLKZ19-03) （中铁一院）
