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本文着眼于日益发展的室内可见光通信技术,简要阐明了该种技术的优越性。本文在构建了室内通信模型的情况下,详细地给出了通信系统组成部分的各项参数,结合信道直流增益公式,利用基于定点的迭代算法,通过MATLAB编程实现了直射信道脉冲响应与一次反射信道脉冲响应的估算,并给出了直观图像加以说明。同时,本文通过信道脉冲响应随着光接收机在封闭空间中相对位置变化而变化的几种情形的比较,得出了光接收机越靠近封闭空间中心区域,信道脉冲响应直射分量功率越大,多径时延越短,整体信道传输特性越优的结论,对于通信系统的参数配置起到了一定指导作用。
This article focuses on the growing indoor visible light communication technology, briefly illustrates the superiority of this technology. In this paper, given the indoor communication model, the parameters of the communication system are given in detail. Combining with the channel DC gain formula, the iterative algorithm based on fixed point is used to realize the direct impulse response and primary reflection Channel impulse response estimation, and gives a visual image to illustrate. At the same time, by comparing the channel impulse response with the change of the relative position of the optical receiver in the closed space, the closer the optical receiver is to the center of the closed space, the larger the power of the impulse response direct component of the channel, The conclusion that the shorter the multipath delay is, the better the overall channel transmission characteristics play a guiding role in the parameter configuration of the communication system.