一种改进型低复杂度的超宽带信道估计算法  

An Improved Low Complexity Channel Estimation Method for UWB Systems

作　　者：李新苗[1] 李有明[1] 徐铁峰[1] 

机构地区：[1]宁波大学通信技术研究所,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2009年第4期459-462,共4页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(60772126);宁波市自然科学基金(2006A610002)

摘　　要：针对多带正交频分复用(MB-OFDM)的超宽带系统,为减小其常规最小均方误差算法的运算量,提出一种改进型低复杂度的超宽带信道估计算法.新算法在原最小均方误差算法的基础上,将求逆问题转化成一簇线性方程组的求解问题,然后通过初等行变换直接得到信道的估计值.新算法不仅降低了原最小均方误差算法的复杂度和运算量,而且保持了原估计方法的性能.并且基于超宽带标准信道CM1的计算机仿真结果也验证了新方法的有效性.An improved channel estimation method with low complexity for multi-band Orthogonal Frequency Division Multiplexing（MB-OFDM） UWB is proposed.To reduce the high computational complexity of the minimum mean square error（MMSE） algorithm,we transform the inversion problem into linear matrix equations which can be handily solved by elementary transformation.Compared with the original MMSE method,the proposed algorithm features not only the lower computational complexity,but also the non-compromising performance.Computer simulation results based on UWB standard IEEE CM1 channel show the efficiency of the proposed approach.

关 键 词：超宽带 信道估计 SVD分解 解方程组 

分 类 号：TN92[电子电信—通信与信息系统]