Low-complexity iterative equalization for OTFS based on alternating minimization  

作　　者：HE Xin JIA Haoxiang SUN Yutong ZHOU Zijian ZHAO Danfeng 

机构地区：[1]School of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China

出　　处：《Journal of Systems Engineering and Electronics》2023年第4期851-860,共10页系统工程与电子技术（英文版）

基　　金：supported by the 54th Research Institute of China E lectronics Technology Group Corporation(SKX212010007)。

摘　　要：To achieve robust communication in high mobility scenarios,an iterative equalization algorithm based on alternating minimization(AM)is proposed for the orthogonal time frequency space(OTFS)system.The algorithm approximates the equalization problem to a convex function optimization problem in the real-valued domain and solves the problem iteratively using the AM algorithm.In the iterative process,the complexity of the proposed algorithm is reduced further based on the study of the cyclic structure and sparse property of the OTFS channel matrix in the delay-Doppler(DD)domain.The new method for OTFS is simulated and verified in a high-speed mobile scenario and the results show that the proposed equalization algorithm has excellent bit error rate performance with low complexity.

关 键 词：orthogonal time frequency space(OTFS) alternating minimization(AM) high-speed mobile scenario iterative equalization 

分 类 号：TN929.5[电子电信—通信与信息系统]