【摘要】 综合分析了几类广义互相关器的性能，简要介绍了极大似然估计器的原理．在此基础上，利用极大似然算法和ＷＯＳＡ谱估计技术，实现了直升机目标定位中的时延估计，通过计算机数值计算和仿真，得到了令人满意的结果．更多还原

【Abstract】 The principle of maximum likelihood estimator is simply described in this paper. The characteristics of several kinds of generalized cross correlators are systematically introduced. Then, the time delay estimation for helicopter locating is performed using maximum likelihood correlation estimator and WOSA power spectral estimation technology. The calculations of the time delay of the measured data of a helicopter noise are carried out through a computer. The results of calculation are satisfying.更多还原