基于IIR非线性信道模型的LMS均衡算法

作者：马婵，蒋树南 日期：2010-06-21/span> 浏览：2852 查看PDF文档

基于IIR非线性信道模型的LMS均衡算法
马婵，蒋树南
（杭州电子科技大学 通信工程学院，浙江 杭州310018）

摘要：在高速数据传输环境下，传输信道的非线性已成为影响信道误码性能的主要因素。针对由功率放大器带来的信道非线性问题，研究了一种基于IIR非线性信道结构的LMS算法，并构建出了一个基于IIR结构的非线性信道传输系统模型。基于该模型，推导了基于IIR结构的LMS算法来估计非线性均衡器的参数。仿真结果表明，在一定的信噪比范围内，提出的IIR LMS算法能达到令人满意的ED性能，有效抑制高速传输信道的码间干扰。
关键词：最小均方；均衡；无限脉冲响应
中图分类号：TN975文献标识码：A文章编号：1001-4551(2010)03-0071-04

LMS equalization algorithm based on the IIR nonlinear channel model

MA Chan, JIANG Shunan
(College of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract: In highspeed data transmission environment, the basic encoding rules(BER) performance was mostly affected by the nonlinear feature of transmission channel. Aiming at the nonlinear feature brought by the power amplifier, the least mean square（LMS） algorithm based on infinite impulse response(IIR) nonlinear channel structure and the construction of IIR structure based on nonlinear channel transmission system model were researched. According to the model, the parameters of nonlinear equalizer were estimated from LMS algorithm based on IIR structure. The simulation result shows, the proposed IIR LMS algorithm can achieve more satisfying ED performance within a certain range of SNR and the inter symbol interference（ISI） of highspeed transmission channel can be inhibited effectively by adopting nonlinear equalization techniques.
Key words: least mean square（LMS）; equalization; infinite impulse response(IIR)