雾天对混沌PPM的LED光通信系统误码率影响  

Influence of Fog on Error Rate of LED Optical Chaotic PPM Communication System

作　　者：王凤英[1] 秦岭 胡晓莉[1] 郭瑛[1] WANG Feng-ying;QIN Ling;HU Xiao-li;GUO Ying(Department of Information Engineer,Inner Mongolia University of Science&Technology,Baotou Inner Mongolia 014010,China)

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010

出　　处：《计算机仿真》2022年第1期134-137,142,共5页Computer Simulation

基　　金：内蒙古自治区自然科学基金资助(2018LH06002,2019LH06005)。

摘　　要：雾天对发光二极管(Light Emitting Diode, LED)光通信系统的路径损耗和误码率产生影响,造成能量不断衰减,严重时导致接收端无法接收信号。现将混沌扩频与脉冲位置调制(Pulse Position Modulation, PPM)技术相结合,研究雾天对混沌脉冲位置调制(Chao-Pulse Position Modulation, CPPM)的LED光通信系统误码率的影响。首先给出雾天LED交通灯与车辆间通信的系统模型,对发送信号进行混沌扩频,之后进行PPM调制,经发送电路将信号发送出去;通过雾天信道,接收电路接收到光信号,紧接着对接收到的信号进行处理,之后进行PPM解调和混沌解扩运算,最后计算雾天对CPPM的LED光通信系统误码率。仿真结果表明,上述系统可以进一步降低光通信系统的误码率,并能提高可见光通信系统安全性。Fog day affects the path loss and error rate of LED optical communication system, and it can cause the energy to continue to decay and the receiver to fail to receive the signal. In the paper, chaotic spread spectrum and PPM were combined, and the influence of fog day on the error rate of the LED optical communication system of CPPM was studied. Firstly, the system model of communication between LED traffic lights and vehicles in fog was given, the transmitted signal was chaotic spread spectrum, then PPM modulation was carried out, and the signal was sent out through the transmitting circuit;Through the fog channel, the receiving circuit received the optical signal, and then processed the received signal, Then PPM demodulation and chaotic despreading operation were carried out, and finally the bit error rate of LED optical communication system for CPPM in fog was calculated. The simulation results show that this system can further reduce the error rate of LED communication system and improve the security of visible light communication system.

关 键 词：雾天 混沌 可见光通信 误码率 

分 类 号：TN911.3[电子电信—通信与信息系统]