基于PLC通信的噪声特性及多载波调制技术研究

基于中压PLC通信的特点,对中压信道噪声特性进行了总结研究,并在Matlah下实现噪声仿真波形;对PLC通信上现有调制解调技术进行比较总结,应用Matlab编程实现了FSK调制解调,并在实现单载波FSK调制解调基础上,实现了多载波FSK调制解调。介绍了采用多载波调制技术实现数字信号传输的基本原理及其优点;从理论上分析总结了中压PLC信道及噪声特性,并结合均衡、编码,小波变换等技术,提出了进一步提高多载波调制系统性能的途径。

Research of noise characteristics and multi-carrier modulation technology based on PLC communication

Based on the characteristics of MV power line carrier communication, first of all, this paper researched and summarized the characteristics of channel noise and realized noise simulation waveforms under the Matlab software;On this basis, compared and summarized the existing modem technology for PLC communications;Applied the Matlab software to achieve the FSK modulation and demodulation. Based on the modulation and demodulation of FSK in the realization of single-carrier, using the software of matlab achieved muti-carrier FSK modulation and demodulation. This paper introduced the multi-carrier modulation technique to achieve the number of the basic principles of signal transmission and the advantages of multi-carrier modulation;Analyzed the Channel characteristics and noise characteristics in the MV PLC theoretically, and combined the techniques of balanced, coding, wavelet transform and so on, put forward to further improve the performance of the system more carrier modulation.