Design of Time-Domain Equalizer in Elastic Wave Earth Channel  

作　　者：吕文红 张福斌 姜平香 

机构地区：[1]College of Information and Electronical Engineering,Shandong University of science and technology

出　　处：《Journal of Measurement Science and Instrumentation》2011年第4期353-357,共5页测试科学与仪器（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61071016)

摘　　要：In low-frequency elastic wave through-the-earth communication system,because of multipath transmission caused by characteristics of the layered earth,the time domain equalizer is different from other wireless communication systems.A modified LMS algorithm of variable step size is proposed based on improvement of traditional LMS.On the base of principle and simulation analysis,the improved Least Mean Square(LMS)algorithm is analyzed and the performances are compared between the improved LMS algorithm and traditional LMS algorithm.In the improved algorithm,the contradiction between convergence speed and the steady-state error is considered at the same time.Therefore,the improved algorithm has good convergence properties and channel-tracking performance.

关 键 词：Inter-Symbol Interference （ ISI ） adaptive equalization stratum channel through-the-earth com-munication system 

分 类 号：TN715[电子电信—电路与系统] O347.41[理学—固体力学]