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Physical Layer Security for Multi-User MIMO Visible Light Communication Systems With Generalized Space Shift Keying

机译：具有广义空间移位键控的多用户MIMO可见光通信系统的物理层安全性

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摘要

We consider the physical layer security (PLS) of multi-user (MU) multiple-input-multiple-output visible light communication (VLC) systems with an eavesdropper (Eve) and propose a novel spatial constellation design technique based on generalized space shift keying (MU-GSSK-SCD). The received signals of the legitimate users are optimized jointly, such that their bit error ratios (BERs) are minimized and Eve's BER is significantly degraded. The emission power of randomly selected light-emitting diodes is adjusted, by exploiting users' channel state information at the transmitter. Our strategy ensures that legitimate users receive confidential messages fully in an undistorted fashion, while any meaningful leakage to Eve is strongly prohibited, without any artificial noise addition. Every user can decode only its information, hence inter-user security is also guaranteed. The PLS improvements are presented in terms of both BERs and achievable secrecy rates in practical VLC scenarios. For various user configurations, it is shown that MU-GSSK-SCD increases the BER at Eve to the 0.5 level, while providing minimized BERs to the legitimate users. The achievable secrecy rate region is derived for MU-GSSK-SCD and it is shown that full secrecy can be achieved at 0 dB signal-to-noise ratio (SNR) level with a user separation as small as 90 cm.
机译：我们考虑使用窃听器（EVE）的多用户（MU）多输入多输出可见光通信（VLC）系统的物理层安全性（VLC）系统，并提出一种基于广义空间移位键控的新型空间星座设计技术（MU-GSSK-SCD）。合法用户的接收信号共同优化，使得它们的误码比率（BERs）最小化，并且EVE的BER显着降低。通过在发射机处利用用户的信道状态信息来调整随机选择的发光二极管的发射力。我们的策略确保合法用户完全收到保密信息，以不朽的方式，而强烈禁止对夏娃的任何有意义泄漏，没有任何人工噪音。每个用户都可以解码其信息，因此也保证了用户间安全性。在实际VLC情景中，PLS改进介绍了BERS和可实现的保密率。对于各种用户配置，显示MU-GSSK-SCD将BEVE增加到0.5级，同时为合法用户提供最小化的BER。可实现的保密率区域用于MU-GSSK-SCD，并显示出可以以0dB信噪比（SNR）电平的完全保密，用户分离小于90cm。

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