MMSE-SD Detection Based Mitigation of Interference in Visible Light Communication Systems

Visible light communication (VLC) is an emerging wireless communication technology that uses light signals emitted from LEDs (Light Emitting Diode), etc. as information carriers to disseminate information. In this paper, we propose a new algorithm to improve the performance of VLC systems. The core of the algorithm is to combine the advantages of the sphere decoding (SD) algorithm and the minimum mean square error (MMSE) algorithm to obtain relatively accurate channel statistics, taking into account issues such as noise interference. The performance of Bit Error Ratio (BER) and sum-rate of the system is verified by using the sphere decoding based minimum mean square error (MMSE-SD) optimization algorithm and other algorithms at the receiver of the system. The whole experimental results illustrate that the scheme proposed in this paper improves the overall performance of the VLC system.