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arXiv 2411.04574cs.ITeess.SPmath.IT
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RIS辅助的空间移位键控:非理想收发机与贪婪检测

RIS-Assisted Space Shift Keying with Non-Ideal Transceivers and Greedy Detection

Aritra Basu, Soumya P. Dash, Sonia Aissa

AI总结:

本文提出两种RIS辅助SSK通信模型,考虑非理想收发机硬件损伤,推导错误概率闭式表达式,并通过仿真验证,揭示硬件损伤对系统性能的影响。

摘要:

可重构智能表面(RIS)和索引调制(IM)是实现高能效可靠无线通信的关键技术。然而,在实际部署中充分利用这些技术,理解底层收发机非理想特性的影响至关重要。在此背景下,本文提出了两种RIS辅助的IM通信模型,其中RIS作为发射机的一部分,并采用空间移位键控(SSK)进行IM,同时评估了它们在硬件损伤存在下的性能。在第一个模型中,RIS仅作为无源反射器,智能地将入射的SSK调制信号反射到期望的接收分集分支/天线。第二个模型将RIS用作发射机,采用M进制相移键控进行反射相位调制(RPM),并同时作为入射SSK调制信号的反射器。考虑受Nakagami-m衰落影响的传输以及接收端的贪婪检测规则,评估了两种系统配置的性能。具体而言,采用成对错误索引检测概率和错误索引检测概率作为性能指标,并为RIS辅助SSK和RIS辅助SSK-RPM系统模型推导了它们的闭式表达式。进行了蒙特卡洛仿真研究以验证分析框架,并给出了数值结果以研究错误性能对系统参数的依赖性。研究结果强调了硬件损伤对所研究通信系统性能的影响。

英文摘要:

Reconfigurable intelligent surfaces (RIS) and index modulation (IM) represent key technologies for enabling reliable wireless communication with high energy efficiency. However, to fully take advantage of these technologies in practical deployments, comprehending the impact of the non-ideal nature of the underlying transceivers is paramount. In this context, this paper introduces two RIS-assisted IM communication models, in which the RIS is part of the transmitter and space-shift keying (SSK) is employed for IM, and assesses their performance in the presence of hardware impairments. In the first model, the RIS acts as a passive reflector only, reflecting the oncoming SSK modulated signal intelligently towards the desired receive diversity branch/antenna. The second model employs RIS as a transmitter, employing M-ary phase-shift keying for reflection phase modulation (RPM), and as a reflector for the incoming SSK modulated signal. Considering transmissions subjected to Nakagami-m fading, and a greedy detection rule at the receiver, the performance of both the system configurations is evaluated. Specifically, the pairwise probability of erroneous index detection and the probability of erroneous index detection are adopted as performance metrics, and their closed-form expressions are derived for the RIS-assisted SSK and RIS-assisted SSK-RPM system models. Monte-Carlo simulation studies are carried out to verify the analytical framework, and numerical results are presented to study the dependency of the error performance on the system parameters. The findings highlight the effect of hardware impairment on the performance of the communication system under study.

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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