电讯技术2026，Vol.66Issue(9)：1492-1498,7.DOI:10.20079/j.issn.1001-893x.250320001
一种可变收敛阈值与双概率限幅的OTFS消息传递检测算法
An OTFS Message Passing Detection Algorithm with Variable Convergence Threshold and Double Probability Clipping
摘要
Abstract
The classical message passing(MP)detection algorithm suffers from the error floor phenomenon and slow convergence in the orthogonal time frequency space(OTFS)systems.To address the shortcomings,an improved MP algorithm combining variable convergence threshold(VCT)and double probability clipping(DPC)is proposed.The VCT mechanism dynamically adjusts the convergence threshold based on the channel noise variance,while the DPC mechanism first dynamically selects the clipping threshold pair based on the channel noise variance and then dynamically selects the clipping intensity based on the maximum probability of the transmitted symbols.Simulation results show that,compared with the MP algorithm,the proposed algorithm effectively reduces the bit error rate(BER)while maintaining a similar complexity,achieving approximately 5 dB performance gain at a BER of 10-5.关键词
正交时频空(OTFS)/信号检测/消息传递/可变收敛阈值/双概率限幅Key words
orthogonal time frequency space(OTFS)/signal detection/message passing/variable convergence threshold/double probability clipping分类
信息技术与安全科学引用本文复制引用
张可汗,何雪云..一种可变收敛阈值与双概率限幅的OTFS消息传递检测算法[J].电讯技术,2026,66(9):1492-1498,7.基金项目
国家自然科学基金资助项目(62171235) （62171235）
