期刊论文

中文

系统仿真学报

1004-731X

2013

25

12

2906-2911

10.16182/j.cnki.joss.2013.12.030

湖南省光学重点学科建设项目资助 衡阳师范学院科研启动项目（12838） 衡阳师范学院产学研用（12CXYY05）

本校为第一机构

LED照明灯具常采用圆环形式，室内可见光通信也可采用这种形式的灯具发射信号。为了研究这种信道的特性，首先分析了通信系统的基本构成，将信道分成直射和漫反射部分。然后采用光线追迹法计算多圆环LED信道的冲激响应，从而计算信道的频率响应。在分析信道的时域特性时，按照光线反射次数分别计算信道的冲激响应。利用各次反射的信道冲激响应分别计算信道的频率响应，并求出信道总的频率响应。最后，用数值方法对室内信道的冲激响应和频率响应进行了仿真。仿真结果表明，光线追迹反射次数无需太高，房间中心位置的带宽最宽，并向四周逐步变窄。

The LED lamp is often used in ring form, which can also transmit signal for indoor visible light communication. In order to study the characteristics of this channel, first, the basic components of the communication system were analyzed, and the channel were divided into direct and diffuse part by ray tracing. And then, the multi-ring LED channel impulse response was calculated, and the frequency response of the channel was derived. After being analyzed, finally, simulation results show its validity and the reflection times are not too high and the channel has the widest bandwidth in the cente...