单观测器无源定位误差下界的仿真分析

单观测器无源定位所能达到的最优定位精度与观测器的运动速度、运动轨迹、测量精度和测量速率密切相关。该文采用仿真方法，分析了观测器运动轨迹、运动速度、测量精度和测量速率等因素对测角无源定位误差Cramer-Rao下界的影响，比较了三种形式观测器轨迹的定位误差下界，得出的结果对确定具体定位与跟踪系统战术指标、以及对滤波算法的选用具有实用价值。

Simulating analysis on estimation error lower bound for single passive observer

At certain measurement rate and error, the best estimation accuracy which inay be achieved by single passive observer is decided by the velocity and trajectory of the observer, independent of the estimation algorithm. In this paper, simulation experiments show the effects of ineasurement rate, error and observer velocity, trajectory on the error Cramer-Rao lower bounds of position estimate under two kinds of observer trajectories. Then the best Cranier-Rao lower bounds of three kinds of observer trajectories are compared. The experimental results are very useful for design of passive target tracking system.