基于Simulink的NLMS弥散信道均衡滤波器的参数优选方法  

Optimal Parameter Choice Method of NLMS Dispersive Channel Equalization Filter Based on Simulink

作　　者：刘剑锋[1] 蒋卓勤[1] 

机构地区：[1]解放军西安通信学院,西安710106

出　　处：《电子器件》2008年第5期1487-1489,1494,共4页Chinese Journal of Electron Devices

摘　　要：为了克服弥散信道的影响,改善通信质量,提高传输数据速率,近年来出现了多种解决方案,其中最有效的方法就是采用NLMS算法的自适应信道均衡技术。设计NLMS算法的自适应信道均衡器的关键就是寻找一组最佳的自适应滤波器的长度L和步长因子,使系统误码率最低。基于此,本文提出了一种能有效搜索均衡滤波器参数的方法,并构建了该方法的Simulink仿真平台。通过仿真,搜索寻找到了系统误码性能最佳条件下自适应滤波器的长度和步长,同时分析了自适应均衡器的性能,仿真结果证明了其有效性。该平台为最优自适应弥散信道均衡滤波器的设计提供了一个很好的平台,具有很高的实用价值。In order to solve effect of dispersive channel, meliorate quality of communication, improve rate of data transmission, a lot of projects appear recently. The best effective method is to use adaptive channel equalization based on NLMS. The key of designing equalizer is to search optimal coefficients of adaptive channel equalized filter. So this paper presents a method of searching optimal coefficients, also creates its Simulink model. Through simulation, this paper gets optimal coefficients of adaptive channel equalized filter under the condition of the best BER performance. According to comparing and analyzing to perform- ance, the adaptive equalizer proves its validity. The simulation model provides good platform for designing optimal adaptive channel equalized filter and has high practical value.

关 键 词：弥散信道 NLMS算法 自适应滤波器 滤波器的长度和步长 

分 类 号：TN914[电子电信—通信与信息系统] TN713[电子电信—信息与通信工程]