电波科学学报2025，Vol.40Issue(1)：155-163,9.DOI:10.12265/j.cjors.2024045
感知辅助和原子选择门限机制下的MIMO-OTFS系统信道估计
Channel estimation of MIMO-OTFS system based on sensing aided and atomic threshold mechanism
摘要
Abstract
Aiming at the problems of large channel estimation calculation overhead and accuracy degradation caused by the maximum delay,Doppler spread,and increase in the number of antennas in the multiple-input multiple-output orthogonal time frequency space(MIMO-OTFS)system,a sensing aided generalized orthogonal matching pursuit algorithm based on atomic threshold(SA-TGOMP)channel estimation algorithm is proposed in this paper.This algorithm first converts the user and surrounding environment information detected by radar into the initial index set of the OTFS channel,and then introduces an iterative strategy of selecting relevant atoms with fixed values and an atomic threshold mechanism to update the support set.Experimental results show that the algorithm proposed in this paper can effectively improve the channel estimation accuracy while reducing pilot overhead.关键词
多输入多输出正交时频空间(MIMO-OTFS)/压缩感知/感知辅助/信道估计Key words
multiple-input multiple-output orthogonal time frequency space(MIMO-OTFS)/compressed sensing/sensing aided/channel estimation分类
信息技术与安全科学引用本文复制引用
彭艺,陈志翔,杨青青..感知辅助和原子选择门限机制下的MIMO-OTFS系统信道估计[J].电波科学学报,2025,40(1):155-163,9.基金项目
国家自然科学基金(61761025) （61761025）
