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arXiv 2104.05939eess.SPcs.ITmath.IT
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正交时间序列复用调制:分析与低复杂度接收机设计

Orthogonal Time Sequency Multiplexing Modulation: Analysis and Low-Complexity Receiver Design

Tharaj Thaj, Emanuele Viterbo, Yi Hong

摘要:

本文提出了正交时间序列复用(OTSM),一种新的单载波调制方案,将信息符号的延迟序列域,其次是级联的时分复用(TDM)和Walsh-Hadamard序列复用。由于Walsh Hadamard变换(WHT),调制和解调不需要复域乘法。对于建议的OTSM,我们首先推导出的输入输出关系的延迟-序列域,并提出了一个低复杂度的检测方法,利用零填充。我们通过仿真表明,OTSM提供了高性能增益超过正交频分复用(OFDM)和类似的性能,正交时频空间(OTFS),但在较低的复杂性,由于WHT。然后提出了一种低复杂度的时域信道估计方法。最后,我们展示了如何包括一个外部的错误控制码和一个涡轮解码器,以改善编码系统的错误性能。

英文摘要:

This paper proposes orthogonal time sequency multiplexing (OTSM), a novel single carrier modulation scheme that places information symbols in the delay-sequency domain followed by a cascade of time-division multiplexing (TDM) and Walsh-Hadamard sequence multiplexing. Thanks to the Walsh Hadamard transform (WHT), the modulation and demodulation do not require complex domain multiplications. For the proposed OTSM, we first derive the input-output relation in the delay-sequency domain and present a low complexity detection method taking advantage of zero-padding. We demonstrate via simulations that OTSM offers high performance gains over orthogonal frequency division multiplexing (OFDM) and similar performance to orthogonal time frequency space (OTFS), but at lower complexity owing to WHT. Then we propose a low complexity time-domain channel estimation method. Finally, we show how to include an outer error control code and a turbo decoder to improve error performance of the coded system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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