Abstract: Orthogonal Frequency Division Multiplexing technique（OFDM） is the best choice for low-voltage power line broadband communication because of its many advantages，and channel estimation is one of the key problems in the OFDM system.The problem of parameter selection in the current power-line LMS channel estimation is adjusted in this paper，and momentum term is first used to accelerate the convergence rate of LMS algorithm in the channel estimation.Simulation results show that the improved algorithm is better than the original one.

摘要： 正交频分复用（OFDM）技术以其多种优势成为低压电力线宽带通信的最佳选择，而信道估计是正交频分复用系统的关键问题之一。修正了当前电力线信道中LMS信道估计参数选择上存在的问题，并首次在信道估计中加入动量项加速LMS算法的收敛速度。仿真结果表明，改进的算法优于原来的信道估计算法。