电力载波通信抗衰落分集技术研究

摘要

电力线载波通信是利用电力线进行通信的一种通信方式，近年来逐渐成为家庭宽带研究的热点。电力线传输环境较差，网络结构复杂，相应的其信道上具有一些复杂特性，基于 PLC 信道频率选择性衰落特性的分析，提出了运用频率分集技术提高通信可靠性的方法。应用 Matlab 编程对多频点 PLC 通信进行建模仿真，解调模块利用频率分集合并技术进行信号解调，仿真结果验证频率分集技术在 PLC 通信系统抗频率选择性衰落具有良好作用。%PLC (Power line carrier) communication is a communication mode implemented by power line, and in recent years, gradually becomes the hot topic for home broadband research. The power line is poor in transmission environment and complex in network structure and channel feature. Based on analysis of PLC channel frequency-selective fading, this paper proposes the frequency diversity technique for improving the reliability of communication. With the application of the simulation on multiple frequencies PLC communication with Matlab programming is carried out, and the signal demodulation also conducted with frequency diversity and combining technique by demodulation module. The simulation result indicates that the frequency diversity technique is of excellent performance in resisting PLC channel frequency-selective fading.