TransMAP: A MAP-Inspired Transformer-Based Detector for OTFS Under Imperfect CSI

doi:10.1109/LWC.2025.3622240

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	TransMAP: A MAP-Inspired Transformer-Based Detector for OTFS Under Imperfect CSI
	Shi, Haiwei 1,2,3; Yu, Hanxiao 1,2,3; Zhou, Yiqing 1,2,3; Shi, Jinglin 1,2,3; Zhou, Shuo 1,2,3
	2026
发表期刊	IEEE WIRELESS COMMUNICATIONS LETTERS
ISSN	2162-2337
卷号	15 页码:275-279
摘要	As a promising alternative to orthogonal frequency division multiplexing (OFDM) in high-mobility scenarios, orthogonal time frequency space (OTFS) modulation still remains a significant challenge in signal detection due to the inherent complexity of delay-Doppler domain operations. Developing efficient detection algorithms has therefore become a key research focus for OTFS. Furthermore, imperfect channel state information (CSI) frequently arises during the OTFS channel estimation, further degrading the detection performance. To address these issues, this letter proposes TransMAP, a Transformer-based OTFS detector, which integrates a symbol embedding module guided by the maximum a posteriori (MAP) criterion to explicitly model symbol-channel relationships. By leveraging attention mechanisms and SE module, TransMAP enhances the robustness to channel estimation errors in OTFS signal detection. Extensive experiments demonstrate its superior detection accuracy compared to conventional and deep learning-based OTFS detectors.
关键词	Symbols Detectors Transformers Signal detection OFDM Encoding Attention mechanisms Accuracy Vectors Channel estimation OTFS transformer MAP detection imperfect CSI attention mechanism
DOI	10.1109/LWC.2025.3622240
收录类别	SCI
语种	英语
WOS研究方向	Computer Science ; Engineering ; Telecommunications
WOS类目	Computer Science, Information Systems ; Engineering, Electrical & Electronic ; Telecommunications
WOS记录号	WOS:001644546300018
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/42966
专题	中国科学院计算技术研究所
通讯作者	Yu, Hanxiao
作者单位	1.Chinese Acad Sci, Inst Comp Technol, State Key Lab Processors, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Beijing Key Lab Mobile Comp & Pervas Device, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Inst Comp Technol, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shi, Haiwei,Yu, Hanxiao,Zhou, Yiqing,et al. TransMAP: A MAP-Inspired Transformer-Based Detector for OTFS Under Imperfect CSI[J]. IEEE WIRELESS COMMUNICATIONS LETTERS,2026,15:275-279.
APA	Shi, Haiwei,Yu, Hanxiao,Zhou, Yiqing,Shi, Jinglin,&Zhou, Shuo.(2026).TransMAP: A MAP-Inspired Transformer-Based Detector for OTFS Under Imperfect CSI.IEEE WIRELESS COMMUNICATIONS LETTERS,15,275-279.
MLA	Shi, Haiwei,et al."TransMAP: A MAP-Inspired Transformer-Based Detector for OTFS Under Imperfect CSI".IEEE WIRELESS COMMUNICATIONS LETTERS 15(2026):275-279.