基于低压电力线传输网的无线光通信研究

摘要

In the paper, a novel communication mechanism combined low-voltage power line network with wireless infrared communication was proposed. The communication modulation method, the signal coupling mode and impedance adaptation were analyzed. And the influence factors in communication system on signal propagation were analyzed also in the paper. The solving method to reinforce load capacity and remove load effect of power line were given accordingly.The experiment results showed the noise of low-voltage power line channel have been reduced by applying appropriate modulation mode and carrier frequency. And the system has been realized signals reliable transmission both in low-voltage power line and sight-distance of atmosphere channel which provides a new method for short distance wireless optical communication.%介绍一种低压电力线传输网与无线红外传输相结合的通信机制,分析了调制方式、信号耦合方式和阻抗匹配以及影响信号传输的因素,给出了增强带负载能力和消除电力线负载效应的解决方法.实验表明,选择合适的调制方式与载波频率可降低电力线信道噪声的影响,实现了低压电力线与大气信道视距内信号稳定可靠传输,为短距离无线光通信提供一种新方法.