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UWB(UltraWideband)系统多用于室内环境中,其多径干扰非常严重,在这种情况下对信道进行精确估计是非常必要的,但同时也是非常困难的。在可分离多径情况下,最大似然算法具有比较好的性能。而在不可分离多径情况下,最大似然算法的性能很差,文中对ML算法进行了改进,可以比较理想的估出信道参数使其能够适用于不可分离多径环境。
UWB (UltraWideband) system is mostly used in indoor environment, its multipath interference is very serious, in this case to accurately estimate the channel is necessary, but at the same time it is very difficult. In the case of separable multipath, the maximum likelihood algorithm has better performance. In the case of inseparable multipath, the performance of the maximum likelihood algorithm is very poor. In this paper, the ML algorithm is improved, and the channel parameters can be estimated optimally so that it can be applied to the environment of inseparable multipath.