Abstract
This paper focuses on the physical layer security for spatial modulation (SM) based indoor visible light communication (VLC) systems with multi-LED transmitters, a legitimate receiver and multiple eavesdroppers. According to the principle of information theory, a lower bound on the SM-based VLC secrecy outage probability (SOP) is derived by considering the non-negativity, average optical intensity and peak optical intensity constraints. Numerical results show that the lower bound of SOP can be used to evaluate system performance.
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