摘要
在低压电力线上实现高速数据传输有着广阔的应用前景和经济价值 ,但是由于电力线信道存在着不可预期的高噪声、多径效应和信道衰落 ,严重制约了高速数据的传输。OFDM(正交频分复用 )是近几年来兴起的在无线信道上实现高速数据传输的新技术。文中介绍了低压输电线上数据传输的特性、OFDM的基本原理和实现方法 ,分析了低压电力线干扰源的特征 ,阐述了
High-speed data communication over low-voltage power lines is an active field with broad application perspective and economic benefits in the world. But due to the unpredictable high noise, multipath effect and attenuation, power line channel is difficult for transmitting high-speed streams. Orthogonal frequency division multiplexing (OFDM) is an emerging technology for wireless high-speed communication in recent years. This paper presents the characteristics of data communication over low-voltage power line, the principle and implementing method of OFDM and the characteristics of power line channel. It also describes the reason and ability of OFDM to resist the interference based on the analysis on the features of interference source on the low-voltage power lines. It can conclude that OFDM also fits in with power line channel.
出处
《电力系统自动化》
EI
CSCD
北大核心
2001年第15期65-68,共4页
Automation of Electric Power Systems
关键词
低压电力线
数据传输
OFDM
多载波调制
Attenuation
Data communication systems
Electric lines
Multipath propagation
Signal interference
Spurious signal noise
Wireless telecommunication systems
