基于drl的混合ris辅助卫星下行通信安全波束形成

2022 IEEE International Conference on Communication, Networks and Satellite (COMNETSAT) Pub Date : 2022-11-03 DOI:10.1109/COMNETSAT56033.2022.9994309

Q. Ngo, Khoa T. Phan, Abdun Mahmood, Wei Xiang

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引用次数: 0

摘要

本文研究了一种基于混合可重构智能面(RIS)的安全多用户MISO卫星下行通信系统。提出了一种鲁棒的卫星和RIS波束形成联合设计，以最大限度地提高整个系统的保密率。考虑过时信道状态信息和功耗的实际模型，对RIS的有源和无源元件进行了优化。利用深度强化学习来解决高动态和多维波束形成设计问题。仿真结果验证了混合RIS相对于传统被动RIS的波束形成设计的有效性和性能提升。

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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DRL-Based Secure Beamforming for Hybrid-RIS Aided Satellite Downlink Communications

In this paper, a secure multiuser MISO satellite downlink communication system is considered with the assist of a hybrid reconfigurable intelligent surface (RIS). A robust satellite and RIS beamforming joint design is formulated to maximize the overall system secrecy rate. The RIS active and passive elements are optimized considering practical models of the outdated channel state information and power consumption. Deep reinforcement learning is leveraged to solve the highly dynamic and multidimensional beamforming design problem. Simulation results confirm the beamforming design effectiveness and the performance gains when exploiting hybrid-RIS over conventional passive RIS.

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2022 IEEE International Conference on Communication, Networks and Satellite (COMNETSAT)

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