Spatial Modulation Based MIMO-OTFS Transmissions

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2021-07-28 DOI:10.1109/ICCCWorkshops52231.2021.9538858

Chunqiong Zhang, Dan Feng, Mengmeng Liu, B. Bai

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引用次数: 2

Abstract

Orthogonal time frequency space (OTFS) is a novel modulation scheme designed in delay-Doppler domain, which shows a strong Doppler-resilience over doubly-dispersive channels. The interaction between delay-Doppler channel and OTFS symbols allows a linear scaling of capacity with the multiple-input multiple-output (MIMO) order and simultaneously enables significant spectral efficiency improvements over traditional multicarrier modulations such as orthogonal frequency division multiplexing (OFDM). In this paper, we investigate the use of spatial modulation (SM) in MIMO-OTFS systems. With the structure of SM-OTFS, the overall spectral efficiency is increased by the base-two logarithm of the number of transmit antennas at least. We demonstrate that such an SM-OTFS system can achieve a higher spectral efficiency than space-time coded OTFS (STC-OTFS) while demand a lower detection complexity. Extensive simulations are carried out under various delay and Doppler conditions, our simulation results demonstrate significant performance gains of SM-OTFS compared to STC-OTFS with various MIMO settings.

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基于MIMO-OTFS传输的空间调制

正交时频空间(OTFS)是一种在延迟-多普勒域设计的新型调制方案，在双色散信道上具有很强的多普勒弹性。延迟多普勒信道和OTFS符号之间的相互作用允许多输入多输出(MIMO)顺序的容量线性扩展，同时比传统的多载波调制(如正交频分复用(OFDM))能够显著提高频谱效率。本文研究了空间调制(SM)在MIMO-OTFS系统中的应用。采用SM-OTFS的结构，总频谱效率至少提高了发射天线数的以2为底的对数。我们证明了这种SM-OTFS系统可以实现比空时编码OTFS (STC-OTFS)更高的频谱效率，同时需要更低的检测复杂度。在各种延迟和多普勒条件下进行了大量仿真，我们的仿真结果表明，与各种MIMO设置的STC-OTFS相比，SM-OTFS的性能得到了显著提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops)

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