Visible to the public Enhancing Security in VLC Systems Through Beamforming

TitleEnhancing Security in VLC Systems Through Beamforming
Publication TypeConference Paper
Year of Publication2020
AuthorsCho, Sunghwan, Chen, Gaojie, Coon, Justin P.
Conference NameGLOBECOM 2020 - 2020 IEEE Global Communications Conference
Date Publisheddec
Keywordsactive eavesdropper, array signal processing, light emitting diodes, Metrics, Null space, optical transmitters, passive eavesdroppers, physical layer security, pubcrawl, Receivers, Resiliency, Scalability, Signal to noise ratio, visible light communication, Visible Light Communications Security, zero-forcing
AbstractThis paper proposes a novel zero-forcing (ZF) beamforming strategy that can simultaneously cope with active and passive eavesdroppers (EDs) in visible light communication systems. A related optimization problem is formulated to maximize the signal-to-noise ratio (SNR) of the legitimate user (UE) while suppressing the SNR of active ED to zero and constraining the average SNR of passive EDs. The proposed beamforming directs the transmission along a particular eigenmode related to the null space of the active ED channel and the intensity of the passive ED point process. An inverse free preconditioned Krylov subspace projection method is used to find the eigenmode. The numerical results show that the proposed ZF beamforming scheme yields better performance relative to a traditional ZF beamforming scheme in the sense of increasing the SNR of the UE and reducing the secrecy outage probability.
Citation Keycho_enhancing_2020