基于导频序列信道缩短的超宽带信道估计  

Channel Estimation for MB-OFDM UWB Based on Pilot Sequences Channel Shortening

作　　者：罗颖光[1] 刘郁林[1] 王国鹏[1] 

机构地区：[1]重庆通信学院DSP研究室,重庆400035

出　　处：《通信技术》2009年第3期62-64,共3页Communications Technology

基　　金：国家自然科学基金资助项目(NO.60672157;NO.60672158);重庆市自然科学基金资助项目(CSTC2005BB4219)

摘　　要：针对多频带超宽带系统,提出一种基于导频序列信道缩短的信道估计方法,解决了循环前缀长度小于信道最大多径延迟时难于估计信道参数的问题。首先在发送信号中插入块状导频,利用最小均方误差准则(MMSE),在接收机前端设计信道缩短均衡器,然后根据均衡器输出序列估计出复合信道,最后通过反卷积解出原信道参数。仿真实验表明:该算法具有良好性能。A novel channel estimation algorithm is proposed for MB-OFDM UWB based on pilot sequences channel shortening, thus to solve the problem that channel can not be easily （cp） short chann is shorter than that of channel. Firstly, by inserting block en el esti pilot mated when the length of Cyclic Prefix into transmitting signals, a channel equalizer using Minimum Mean Square Error （MMSE） is designed in front of the receiver. Then, the combined is estimated by using the received signals of shortening equalizer. Finally, the original channel can be estimated by deconvolution. Simulation results indicate that this algorithm is of good performance.

关 键 词：超宽带 正交频分复用 信道缩短 信道估计 

分 类 号：TN911.5[电子电信—通信与信息系统]