电磁干扰对电力线网络的传输质量与频谱的影响  

Analysis of EMI Quality and Spectrum Over PLC

作　　者：吴庭育 李维聪[1] 吕伟民[1] 詹弘麟 

机构地区：[1]淡江大学电机工程学系

出　　处：《北京交通大学学报》2010年第3期29-35,共7页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国科会研究计划项目资助(NSC98-2219-E-032-001)

摘　　要：电力线通信(Power-Line Communication,PLC)系统是利用信号耦合的方式,将载波耦合到AC电力线的弦波信号上,经由电力线来传输网络数据.本文主要探讨常见的家电用品对PLC系统的影响.量测工具使用LabVIEW软件来撷取数据,针对距离、电器设备差异计算信噪比(SNR)、信道频率响应(CFR)以及上传/下载速度对通信质量影响.由量测的结果得知,目前PLC系统所遇到的衰减问题大多与外界的噪声大小或与AC传输线的距离有关,经由量测的资料结果可以当作改善PLC系统效能的依据.The power-line communication （PLC） system is a method of coupling signals to AC sine waves.The aim of this paper is to investigate the influence of the in-use household appliances to the power-line communication system.By using LABVIEW software to retrieve data,according to the different distances and electrical appliances,we calculate the effects of the signal noise （SNR）,channel frequency response （CFR） and upload/download speed upon communication quality through the spectrum analyzer.At present,the decadence power-line communication system encounters is mostly related to the external noise and the length of AC transmission line.The retrieved data can be regarded as the basis to improve the efficiency of the PLC system.

关 键 词：电力线通信 信噪比 信道频率响应 

分 类 号：TN915.853[电子电信—通信与信息系统]