电力线载波通信信道特性的影响因素分析  

Analysis of influence factors on power-line communication channel characteristics

作　　者：罗汉武[1,2] 蔡伟[1] 乐健[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]内蒙古东部电力有限公司,内蒙古呼和浩特010020

出　　处：《电力系统保护与控制》2013年第7期73-78,共6页Power System Protection and Control

基　　金：国家自然科学基金(51007065)~~

摘　　要：电力线信道模型的建立和信道特性影响因素分析是电力线上实现高速数据传输的理论基础。利用基于信息节点的建模方法建立了电力线载波通信信道传输特性的数学模型,在此基础上分析了信号源到接收源之间主干线长度、分支线路长度、支路负载阻抗和分支数量等因素对信道传输特性的影响规律,重点分析了这些影响因素对信号衰减幅值的影响。分析发现在信号衰减峰处,线路输入阻抗均基本保持为一个固定值。得出的结论为设计电力线载波通信的调制方法提供了必要的基础和依据。The power line channel modeling and the analysis of influence factors are the theoretical basis of high-speed data transmission over the power line. The paper proposes a channel modeling approach of the power-line communication channel based on the information nodes, and then presents the influence laws of the factors such as the length between transmitter and receiver, branched line lengths, branched load impedances and number of branches on channel transmission characteristics. The paper emphatically analyzes the influence of attenuation amplitude induced by these factors. It is seen that the power-line input impedance is fixed at signal attenuation peak frequency point. The conclusions provide the necessary theoretical basis for power-line communication modulation method.

关 键 词：电力线载波通信 信息节点 信道模型 信道传输特性 频率衰减 

分 类 号：TN913.6[电子电信—通信与信息系统]