Orthogonal Time Frequency Space (OTFS) With Dual-Mode Index Modulation

被引：41
作者：
Zhao, Hang [1 ]
He, Dongxuan [2 ]
Kang, Ziqi [1 ]
Wang, Hua [1 ]
机构：
[1] Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China
[2] Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2021年 / 10卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Indexes; Detectors; Modulation; OFDM; Time-frequency analysis; Table lookup; Delays; OTFS; dual-mode index modulation; OTFS-DM-IM; modified log-likelihood ratio detector;
D O I：
10.1109/LWC.2021.3053981
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Orthogonal time frequency space (OTFS) modulation has been proved to have better bit error rate (BER) performance over orthogonal frequency division multiplexing (OFDM) under high-mobility conditions. In this letter, a new transmission scheme, called OTFS with dual-mode index modulation (OTFS-DM-IM), is proposed to balance the transmission reliability and spectral efficiency. Moreover, a modified log-likelihood ratio (LLR) detector based on the minimum Hamming distance is designed for demodulation. Then, the theoretical BER analysis of the proposed OTFS-DM-IM is presented. Simulation results highlight the performance advantage of OTFS-DM-IM over classical OTFS and the existing OTFS systems based on index modulation (OTFS-IM), and also confirm the superiority of the modified LLR detector compared to maximum likelihood detector and conventional LLR detector.
引用
收藏
页码：991 / 995
页数：5
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