基于匹配追踪的MB-OFDM时域信道估计  

Channel estimation for MB-OFDM systems based on matching pursuit in the frequency domain

作　　者：张先玉[1] 刘郁林[1] 罗颖光[1] 

机构地区：[1]重庆通信学院DSP实验室,重庆400035

出　　处：《安徽大学学报（自然科学版）》2009年第1期44-47,共4页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60672157;60672158);重庆市自然科学基金资助项目(CSTC2005BB4219)

摘　　要：针对超宽带信道的稀疏特性,基于MB-OFDM系统提出一种基于匹配追踪的时域信道估计算法(MP-TD).首先利用OFDM数据块的循环卷积特性建立一种时域模型,然后采用匹配追踪(MP)算法探测出非零抽头的位置,最后利用非零抽头位置信息降低了估计维数并通过时域方法估计出信道.仿真证实了算法的有效性.A novel channel estimation algorithm was proposed for MB-OFDM Ultra Wide-Band systems based on matching puisuit by exploiting the sparse property of channel impulse response. Firstly, a model in the time domain was established by utilizing the cyclic convolution property of the OFDM block. Then the nonzero taps were detected by exploiting the Matching Pursuit （MP） algorithm. Finally, the model was simplified and the channel parameters were gained by LS algorithm in the time domain. And the simulation results demonstrated the efficiency of the algorithm.

关 键 词：多频带正交频分复用 超宽带 抽头探测 匹配追踪 

分 类 号：TN911.7[电子电信—通信与信息系统]