The latter primarily improves the transmission distance and reliability by selecting the repeater automatically . the frequency domain auto - adaptatation filter algorithm is deduced and reliabity by selecting the repeater automatically . the frequency domain auto - adaptaion filter algorithm is deduced and a method of frequency domain algorithm to restrain the marrow band interference is given on the foundation of the time domain minimum mean square error auto - adaptation filter . then the meter reading system to can learn the power network structure and automatically create linked path by using neural networks auto - study ability and analyzing the reading data 后者主要是对中继节点的自动选择，以提高信息的传输距离与可靠性。针对电力线扩频通信信道的特点，在时域最小均方误差自适应滤波算法的基础上，推导了频域自适应滤波算法，并提出了频域算法抑制窄带干扰的具体方法。运用神经网络的自学习方法，通过对抄读数据进行分析，使抄表系统感知电网拓扑结构，自动建立中继路径。
