针对在单站纯方位目标运动分析中观测器机动航路和定位与跟踪精度问题,基于目标定位跟踪精度下限CRLB,提出用精度几何散布GDOP作为优化性能指标,采用数值寻优计算的方法,对表达式较复杂的单观测器测向无源定位的定位误差下限进行数值计算,以找出影响定位精度的主要因素。分析了观测器航路对固定目标定位精度的影响效果,并且给出了匀速直线运动航路和恒提前角匀速运动航路对目标定位精度影响的仿真计算结果,表明航路对定位精度存在很大影响,可以通过优化观测器航路来提高系统可观测程度和改善定位与跟踪算法的性能。

Concerning on the problem of obsever maneuvering trajectory and target position tracking precision in bearing-only target motion analysis for single station,and based on target position tracking lower limit CRLB,the Geometric Dilution of Precision (GDOP) is proposed to be the optimal performance indicator. The target position tracking lower limit of passive localization with complex expression is calculated by the way of numerical optimization calculation to obtain main factors affecting target position tracking precision. The influence of observer trajectory on fixed target localizing precision is analyzed. Simulations were carried out to study the influence of the routes of uniform motion in a straight line and constant advance angel uniform motion. The result showed that the route has great influence on target localizing precision.Therefore,observation route optimization can be used to enhance the observed extent and improve the performance of the positioning and tracking algorithm.