中文摘要：

研究定位中的超宽带（Ultra Wide—band，简称UWB）信号时延估计问题。给出UWB信号的模型，在研究传统的相关法、双谱法及MUSIC算法的基础上，提出一种改进的MUSIC算法。通过仿真实验，给出估计性能曲线，和传统的相关法、双谱法及MUSIC算法相比，仿真结果表明改进的MUSIC算法具有更好的估计性能。

英文摘要：

The issue of time delay estimation of Ultra Wide -band（UWB） signal is considered, the signal model of UWB is given, the traditional time delay estimation method of correlation approa- ches, bispectrum method and the MUSIC algorithm is studied, and then, an improved MUSIC algorithm is constructed in this paper. Finally, the performance curve of time delay estimation is given through computer simulation, compared with the traditional time delay estimation method of correlation approaches, bispectrum method and the MUSIC algorithm, the simulation results show that the improved MUSIC algorithm has a good performance.