可见光通信调光编码研究

在室内可见光通信系统中,通常需要系统根据用 户的需求在不同的场合提供调光能力并要求其 通信质量不受影响。采用一种调光编码方法使得室内可见光通信系统具有调光能力,同时将 该方法与 信道编码相结合保证了系统的可靠通信。首先分析了该方法的结构、编译码原理及调光能力 ,论证了 调光率间隔与码长有关,并且如果要扩大系统的调光范围可以采用级联编码方案。接着应用 MATLAB 对加入该编码方法的可见光通信系统进行仿真,仿真结果表明该方法可以实现调光并能有效 地进行纠错,验证了所提算法有效性与可行性。

Dimming coding scheme in visible light communication

The indoor visible light communication system is supposed to provide n ot only efficient communication but also variable illumination according to user demand in differe nt scenarios, such as office,conference room,lecture room,etc.A dimming coding scheme (DCS ) with correction coding is proposed to let the system has both dimming ability and reliable commu nication.First, the system model,principle of coder and decoder as well as the DCS dimming per formance are introduced and analyzed.The dimming interval depends on the length of DCS.And a cascade method can be chosen to expand the dimming range.Then the system with DCS and channel coding are simulated based on MATLAB.The simulation results show that this system can dim effectively and improve the communication quality,Which indicates that the proposed method i s feasible and effective.