信号数目估计错误的最大似然波达方向估计的性能分析

Performance Analysis of ML DOA Estimate with Incorrect Signal Number

本文分析了当信号数目估计与真正的信号数目有出入时的波达方向（ＤＯＡ）最大似然（ＭＬ）估计的性能．文中给出此时角度估计的渐近分布，也就给出了这一估计的渐近方差的解析表达式，计算机模拟试验表明，理论预计结果是相当准确的．

In this paper,an analysis of the performance of the ML method of directions of arrival estimation is carried out,in the case where estimated number of signals is different from the real signal number.An asymptotic distribution of the estimation is derived,from which the analytic expressions of asymptotic estimation variance are given.The results expected by the theory are in satisfactory agreement with the computer simulation.