RIS辅助OTFS在分数延迟-多普勒下的输入输出关系与性能
信息论
2022-10-26 v1 信号处理
math.IT
摘要
可重构智能表面(RIS)与正交时频空(OTFS)调制在近期无线通信研究中受到关注。RIS技术通过将入射电磁波反射至接收端来辅助通信,而OTFS调制在高多普勒信道中表现有效。本文对高多普勒信道中RIS辅助OTFS进行了早期研究。我们考虑矩形脉冲与分数延迟-多普勒值,推导了RIS辅助OTFS系统的端到端延迟-多普勒(DD)域输入输出关系。我们还考虑了用于RIS辅助OTFS的Zak接收机,其利用Zak变换一步将接收时域信号转换至DD域,并推导了其端到端输入输出关系。仿真结果表明: RIS辅助OTFS优于无RIS的OTFS, Zak接收机优于两步接收机, RIS辅助OTFS相比RIS辅助OFDM具有更优性能。
引用
@article{arxiv.2210.13989,
title = {Input-Output Relation and Performance of RIS-Aided OTFS with Fractional Delay-Doppler},
author = {Vighnesh S Bhat and Gandhodi Harshavardhan and A. Chockalingam},
journal= {arXiv preprint arXiv:2210.13989},
year = {2022}
}
备注
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