MB-OFDM超宽带系统中基于噪声消除的信道估计  

Channel Estimation Based on Noise Reduction in MB-OFDM UWB Systems

作　　者：罗颖光[1] 刘郁林[1] 王国鹏[1] 张先玉[1] 

机构地区：[1]重庆通信学院DSP研究室,重庆400035

出　　处：《电讯技术》2009年第5期5-8,共4页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(60672157;60672158)

摘　　要：在MB-OFDM超宽带系统中,针对采用时域滤波器算法估计出信道后内部噪声残留的问题,提出一种改进的信道估计算法。首先采用时域滤波器算法对信道进行估计,然后利用最大后验概率准则估计滤波器内部噪声,最后通过消除该噪声得到最终的信道估计。仿真结果表明,该算法相比时域滤波器算法具有更优的性能。In view of noise residual in the filter after channel estimated using time filter algorithm, an improved channel estimation algorithm is proposed for MB - OFDM UWB systems, Firstly, channel is estimated by using time filter algorithm. Then, the noise residual in the filter is estimated based on maximum a posteriori criterion. Finally, the final channel estimation is obtained by removing the noise. Simulation results show that the algorithm has better performance than time filter algorithm.

关 键 词：超宽带通信 正交频分复用 最大后验概率准则 信道估计 

分 类 号：TN911.5[电子电信—通信与信息系统]