Multiple Optical Beam Switching for Physical Layer Security of Visible Light Communications

IEEE Photonics Journal

Chih-Lin I¹  Jintao Wang²  Hui Yang²  Jupeng Ding³  Lili Wang⁴ 

[1] Chief Scientist of wireless technologies at China Mobile Research Institute, Beijing, China;Department of Electronic Engineering, Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, China;Key Laboratory of Signal Detection and Processing in Xinjiang Uygur Autonomous Region, College of Information Science and Engineering, Xinjiang University, Urumqi, China;School of Information and Electrical Engineering, Ludong University, Yantai, China;

关键词: Multiple optical beam switching;    physical layer security;    secrecy capacity;    visible light communications;   

DOI  :  10.1109/JPHOT.2021.3136233

来源: DOAJ

【 摘 要 】

Visible light communications (VLC) techniques are viewed as promising candidates for the upcoming B5G&6G mobile wireless networks. Due to the broadcast nature of VLC channel, physical layer security (PLS) techniques have been considered and explored to improve the confidentiality of VLC transmission. Nevertheless, almost all current designs focus on application scenarios including sufficient transmitters and fail to match the scenarios with limited, even just two transmitters. For addressing this challenge, in this article, multiple optical beam switching scheme is proposed. Unlike conventional Lambertian beam based technique paradigm, the given scheme tentatively utilize two asymmetry non-Lambertian beams to configure each VLC transmitter. Numerical results show that, for the typical center legitimate receiver, compared with about 0.92 bps/Hz average secrecy capacity (SC) of the conventional Lambertian beam configuration, up to 5.55 bps/Hz average SC gain is acquired through the proposed beam switching scheme. Moreover, this potential gain will be enhanced to about 5.86 bps/Hz when three candidate non-Lambertian beams are available for each transmitter.

【 授权许可】

Unknown