基于信道缩短的多频带超宽带信道估计  

Channel Estimation for MB-OFDM UWB Based on Channel Shortening

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：《无线通信技术》2009年第3期14-17,共4页Wireless Communication Technology

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

摘　　要：针对多频带超宽带系统,提出了一种基于信道缩短的信道估计方法。利用循环前缀(CP)结构,在接收机前端设计信道缩短均衡器,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。根据均衡器输出序列估计出复合信道,通过反卷积解出原信道参数。计算仿真表明该算法具有良好性能。A novel channel estimation algorithm is proposed for MB - OFDM UWB systems based on channel shortening. A channel shortening equalizer using the structure of Cyclic Prefix （CP） in MB - OFDM is designed in front of the system, for the sake of solving the problem that channel can not easily be estimated when the length of Cyclic Prefix is shorter than that of channel. The effective channel is estimated using the received signals of shortening equalizer and original channel can be estimated by deconvolution. Simulation results demonstrate better performance can be achieved.

关 键 词：多频带超宽带 信道缩短 信道估计 

分 类 号：TN911.5[电子电信—通信与信息系统]