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Beamforming and power allocation for physical-layer security in hybrid RF/VLC wireless networks

机译：混合RF / VLC无线网络中用于物理层安全性的波束成形和功率分配

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摘要

Visible light communication (VLC) has emerged as a promising candidate to complement and enhance the performance of the existing radio frequency (RF) networks in indoor environments. Due to the broadcast nature of both RF and VLC channels, improving the transmission confidentiality is a requirement in practical wireless networks. Physical-layer security has emerged to provide a first line of defense against eavesdropping attacks. In this paper, we study the physical layer security problem of a hybrid RF/VLC system. First, we formulate the minimization problem of the consumed electrical power in the hybrid RF/VLC network while satisfying the user's required secrecy rate. Then, we propose a zero forcing beamforming strategy and a minimum power allocation algorithm. Simulations results show that the proposed power allocation and beamforming algorithms outperform the benchmark algorithms in terms of the average consumed electrical power in various indoor scenarios.
机译：可见光通信（VLC）已成为有前途的候选产品，以补充和增强室内环境中现有射频（RF）网络的性能。由于RF和VLC频道的广播特性，提高传输机密性是实际无线网络中的一项要求。物理层安全性已经出现，可以提供针对窃听攻击的第一道防线。在本文中，我们研究了混合RF / VLC系统的物理层安全性问题。首先，我们在满足用户所需的保密率的同时，制定了混合RF / VLC网络中功耗最小的问题。然后，我们提出了一种零强迫波束成形策略和最小功率分配算法。仿真结果表明，在各种室内场景下，所建议的功率分配和波束成形算法在性能上均优于基准算法。

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