Transmit Diversity Scheme Design for Rectangular Pulse Shaping Based OTFS
Transmit Diversity Scheme Design for Rectangular Pulse Shaping Based OTFS作者机构：State Key Laboratory of Rail Traffic Control and SafetyBeijing Jiaotong UniversityBeijing 00044China vivo Mobile Communication Co.Ltd.Beijing 100016China
出 版 物：《China Communications》 (中国通信（英文版）)
年 卷 期：2022年第19卷第3期
页 面：116-128页
核心收录：
学科分类：0810[工学-信息与通信工程] 08[工学] 0804[工学-仪器科学与技术] 080402[工学-测试计量技术及仪器] 082302[工学-交通信息工程及控制] 0823[工学-交通运输工程]
基 金：supported in part by the Fundamental Research Funds for the Central Universities under Grants 2020JBM081 and 2020JBZD005 in part by the National Key R&D Program of China under Grant 2020YFB1806903 in part by the National Natural Science Foundation under Grant U1834210。
主 题：guard symbols multiple antennas OTFS transmit diversity
摘 要：This paper investigates the transmission scheme of the orthogonal time frequency space(OTFS)system with multiple antennas.Previous works have studied the multi-antenna transmitter diversity scheme with the ideal pulse shaping in OTFS systems assuming the wireless channels of two consecutive frames duration are invariant.However,the ideal pulse shaping can not be realized in practice and the channel varies rapidly in two consecutive frames in the high-speed mobility scenarios.To this end,we redesign the multi-antenna transmitter diversity scheme to ensure its practicability in the rectangular-pulsebased OTFS systems.At first,the information symbols of each antenna are divided into two half frames along the Doppler domain.Then,the guard symbols are carefully arranged to eliminate the interference between two half frames,and to ensure the equivalent channels of two half frames being identical.By considering the positions of the guard symbols,the transmission codeword is designed and a low complexity linear detection is proposed.Finally,simulation results validate that the bit error rate performance of the proposed scheme has the superiority over the existing works.
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