Phase-Aligned Physical-Layer Network Coding in Visible Light Communications

IEEE Photonics Journal

Qing Yang¹  Xun Guan²  Calvin Chun-Kit Chan³  Taotao Wang⁴ 

[1] Laval, Qu&x00E9;Center for Optics, Photonics, and Lasers, Universit&x00E9;College of Information Engineering, Shenzhen, Shenzhen UniversityChina;bec, QC, Canada;

关键词: Visible light communication (VLC);    physical-layer network coding (PNC);    phase alignment;    power ratio;   

DOI  :  10.1109/JPHOT.2019.2904954

来源: DOAJ

【 摘 要 】

Deploying relay nodes in visible light communication (VLC) relieves the requirement of line-of-sight transmission and thus extends the service coverage of VLC systems. In this paper, we propose to employ physical-layer network coding (PNC) in the VLC system to increase its throughput by boosting the data transmission at the relay node. We design a unified PNC-VLC framework that includes both the physical-layer signal processing algorithm and the medium access control method. To further improve the feasibility, we propose a novel phase-aligning method to counter the phase offset among nodes in practical VLC systems. Experimental results show a throughput improvement of 88.23% by employing the PNC-VLC framework, and the link budget is reduced by 4 dB at a bit error rate of 3.8 × 10^-3 by using the phase-aligning method.

【 授权许可】

Unknown