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arXiv 2602.06755eess.SP
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多功能RIS赋能的雷达与通信共存:信道建模与亚6GHz室内测量活动

Multi-Functional RIS-enabled Radar and Communication Coexistence: Channel Modeling and a Sub-6 GHz Indoor Measurement Campaign

University of Surrey(萨里大学);InterDigital(互数科技);British Telecom(英国电信)

Anton Tishchenko, Demos Serghiou, Hamidreza Taghvaee, Arman Shojaeifard, Ahmed Elzanaty, Gabriele Gradoni, Mohsen Khalily, Rahim Tafazolli

AI总结:

本文提出一种多功能RIS赋能的雷达与通信共存系统,通过信道建模和亚6GHz室内测量,展示了RIS在减少延迟扩展和提升相干带宽方面的效果。

摘要:

本文分析了由多功能可重构智能表面(MF-RIS)赋能的雷达与通信共存(RCC)系统,详细阐述了其相位合成码本生成的关键方面以及基于密度聚类(DBSCAN)的实时用户跟踪定位算法,该算法采用卡尔曼滤波预测用户移动性。我们为所描述的MF-RIS系统推导出一种兼容3GPP的雷达截面(RCS)和再辐射模式的信道模型,并补充了信道测量数据。我们获得了大尺度和小尺度特性,包括路径损耗、阴影衰落、Rician因子、簇功率和均方延迟扩展。研究表明,亚6GHz室内的传播在有阻断视距(LoS)路径的情况下仍基本无盲区。因此,所提出的信道模型包含非视距(NLoS)路径,包括由MF-RIS创建的路径。我们还对第五代(5G)新无线电(NR)单用户多输入多输出(SU-MIMO)系统中的信道吞吐量进行了实验评估,报告了在MF-RIS近场内与无RIS设置相比,吞吐量方差减少了74%,总速率提高了12.5%。这一结果表明,MF-RIS可通过为移动用户提供虚拟视距(vLoS)路径来最小化延迟扩展并增加相干带宽,从而有效增强无线MIMO信道。

英文摘要:

In this work, we analyze a multi-functional reconfigurable intelligent surface (MF-RIS)-enabled radar and communication coexistence (RCC) system, detailing the key aspects of its phase synthesis codebook generation and the implemented localization algorithm for real-time user tracking based on density-based spatial clustering of applications with noise (DBSCAN), which features a Kalman filter for the prediction of user mobility. We derived a 3GPP-compatible radar cross-section (RCS) and re-radiation pattern-based channel model for the described MF-RIS system, supplementing it with channel measurements. We obtained large and small-scale characteristics, including path loss, shadow fading, Rician K-factor, cluster powers, and RMS delay spread. The study finds that Sub-6 GHz indoor propagation is largely free of blind spots, even with a blocked line-of-sight (LoS) path. Therefore, the proposed channel model includes non-line-of-sight (NLoS) paths, including the ones created by the MF-RIS. We also performed an experimental evaluation of the channel throughput in a fifth generation (5G) new radio (NR) single user multiple-input-multiple-output (SU-MIMO) system, reporting a 74\% reduction in throughput variance and a 12.5\% sum-rate improvement within the MF-RIS near-field compared to the no-RIS setup. This result shows that the MF-RIS can minimize delay spread and increase the coherence bandwidth by creating virtual-LoS (vLoS) path for the moving user, thereby effectively hardening wireless MIMO channels.

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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