一种基于最小均方误差的无线局域网信道估计算法  

A Channel Estimate Algorithm Based on Least-Mean-Square Error in Wireless LAN

作　　者：王永学[1] 杨柳[1] 叶礼兵[1] 李昌斌[1] 

机构地区：[1]深圳职业技术学院电子与信息工程学院,广东深圳510855

出　　处：《深圳职业技术学院学报》2008年第2期3-5,23,共4页Journal of Shenzhen Polytechnic

基　　金：深圳市科技局资助项目(07KJcb137)

摘　　要：在基于IEEE 802.11b标准的无线局域网中,提出了一种基于最小均方误差的自适应信道估计算法。通过已知码片的训练,可快速准确地估计出系统信道参数。仿真结果表明,在典型的JTC-OfficeA多径信道模型下,该算法可保证良好的系统误码率性能,在信噪比为8dB时,误码率就已经小于10^(-4);此外,算法的估计误差仅需20-30个码片的训练就快速收敛,从而大幅降低了算法复杂度,是一种简单实用的算法,便于硬件实现。An adaptive channel estimate algorithm based on least-mean-square error is proposed in IEEE 802.1 lb WLAN system. It can estimate channel impulse response of system rapidly and precisely through the training of known chips. In typical JTC-OfficeA multi-path channel, the algorithm guarantees good system Bit-Error-Rate performance and the BER is less than 10^-4 when signal noise ratio is 8dB. Furthermore, the channel estimate error converges rapidly through the training of only 20-30 chips, thus greatly reducing complexity of the algorithm. It is a simple and useful algorithm and can be easily realized through hardware.

关 键 词：无线局域网 最小均方误差 自适应 信道估计 

分 类 号：TN919.5[电子电信—通信与信息系统]