双站无源定位最佳配置分析

为了提高双站无源定位精度,在全局坐标系下分析了双站纯方位定位系统的最佳配置形式。首先研究了最小GDOP(Geometric Dilution of Precision)意义下的方位角约束关系及最优夹角,得到双站的最佳配置形式是目标与两传感器间呈一确定夹角的等腰三角形;在此基础上,讨论了夹角对GDOP的影响进而提出有效定位区域的概念,指出只有当目标位于该区域内时双站才能获得较好的定位精度。仿真结果验证了上述关于最佳配置形式及有效定位区域的分析,指出该结论可以应用到基于传感器管理的多站无源定位算法中。

Optimal Allocation of Dual-Sensor Passive Localization

To improve dual-sensor passive localization precision,the optimal allocation form of dual-sensor bearing-only localization is analyzed in the global coordinate system.The azimuth constraint relation and the optimal cut angle are studied firstly in the sense of minimum GDOP,which indicates that the optimal allocation of dual-sensor system is that the target and two sensors present an isosceles triangle with a certain cut angle.On the basis of the study,the influence of cut angle to the GDOP is discussed and then the concept of Effective Localization Region(ELR) is put forward,which shows that only when the target is located in the above region dual-sensor system can achieve better localization precision.Simulation results verify the analysis of the optimal allocation form and ELR above,which can be used in multi-sensor passive localization algorithms based on sensor management.