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为了实现超宽带(UWB)信号高效、稳定接收,提出一种基于信道频域特性的UWB信道盲估计算法.利用跳时脉冲相位调制超宽带信号一维统计平稳特性,结合递归最小二乘算法计算,达到信道参数盲估计的目的.计算机仿真结果与最大似然法信道盲估计算法结果的对比表明,新算法在误码率为10-4时,信噪比增益约为3 dB.新算法可同时对多路信道进行估计,对幅度和相位不存在模糊因子,且具有低复杂度的优点.
In order to realize the UWB signal’s efficient and stable reception, a channel estimation algorithm based on the frequency domain characteristics of UWB channel is proposed.Based on the one-dimensional statistical stability characteristics of UWB signals modulated by the time-hopping pulse and the recursive least squares algorithm , So as to achieve the blind estimation of channel parameters.The comparison between the results of computer simulation and the maximum likelihood method blind channel estimation shows that the new algorithm has a SNR gain of about 3 dB at bit error rate of 10-4.The new algorithm At the same time, the multi-channel channel is estimated, there is no ambiguity factor for the amplitude and phase, and has the advantages of low complexity.