基于低压电力线实测信道特性的OFDM分析和仿真  

ANALYSIS AND SIMULATION OF THE OFDM BASED COMMUNICATION OVER LOW VOLTAGE POWER LINE

作　　者：张有兵[1] 程时杰[1] 熊兰[1] 

机构地区：[1]华中科技大学电力工程系,湖北省武汉市430074

出　　处：《电力系统自动化》2003年第11期16-20,33,共6页Automation of Electric Power Systems

基　　金：中华电力教育基金会许继奖教金资助项目

摘　　要：根据大量实测数据 ,得到了 3种典型情况的低压电力线信道特性 ,基于此 ,对利用正交频分复用 ( OFDM)调制技术实现高速载波通信的问题进行了分析和仿真研究。讨论了这种通信系统的抗多径干扰性能以及通信系统的参数问题 ,针对几种不同的信号调制方式和不同的发送功率 ,对OFDM系统的传输性能进行了时域仿真 ,结果表明 ,在具有一定的允许发送功率时 ,使用Based on the measurements obtained from the practical low voltage power line, three types of channel characteristics are presented. The characteristics of the orthogonal frequency division multiplexing (OFDM) based high rate digital communication are analyzed and simulated. The capability of the signal transmission system in overcoming multi path interference and the selection of the parameters are discussed. Also, time domain simulations are carried out to investigate the transmission capability of the OFDM communication system for different signal modulation methods and transmission power levels. Simulation results show that it is possible to realize an OFDM based high rate digital communication with low voltage power line when transmission power is large enough.

关 键 词：电力系统 电力线通信 正交频分复用 数据通信 时域仿真 0FDM 低压电力线 信道特性 

分 类 号：TM743[电气工程—电力系统及自动化]