基于非正交复用的可见光通信系统

Visible Light Communication System Based on Non-orthogonal Multiplexing

针对目前可见光通信系统中存在的通信可靠性与用户公平性难以满足要求的问题,提出基于非正交复用的可见光通信系统。该系统在发送端根据信道增益对用户进行功率分配,在接收端利用串行干扰消除技术进一步提高了可靠性。数值仿真结果表明,在双用户系统中,用户1在误码率为10-4时有2.4 dB的性能提升,用户2也有4.7 dB左右的性能提升,可靠性明显提高,且用户间误码率差异明显低于DCO-OFDM系统,用户公平性更加良好。

Aiming at the problem of communication reliability and user fairness in visible light communication system,a visible light communication system based on non orthogonal multiplexing was proposed.The system allocated power to users according to the channel gain at the transmitter,and used serial interference cancellation at the receiver to further improve the reliability.The numerical simulation results showed that in the 2-user system,the performance of user 1 was improved by 2.4 db when the BER was 10-4,and the performance of user 2 was improved by about 4.7 db.The reliability was significantly improved,and the BER difference between users was significantly lower than that of dco-ofdm system.