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为了深入了解多站无源定位的机理进而提高其定位精度,对双站纯方位无源定位中的相关问题进行了理论分析。首先研究了影响双站定位性能的因素,指出只有当测量误差足够小及两传感器间夹角不接近0和π时,双站系统才具有无偏性并有可能达到一致性估计;其次,指出当过小和过大夹角相对于0和π而言具有相同的幅度时,过小夹角对定位精度的消极影响要大于过大夹角;最后,分析了两种定位误差协方差获取方法的等价性。仿真结果验证了对上述问题的分析,并指出本文结论可以应用到基于传感器管理的多站无源定位算法中。
In order to deeply understand the mechanism of multi-station passive location and improve its positioning accuracy, the theoretical analysis of the related issues in the double-station purely azimuth passive location is carried out. Firstly, the factors affecting the performance of dual-station positioning are studied. It is pointed out that the dual-station system is unbiased and likely to reach a consensus estimate only when the measurement error is small enough and the angle between the two sensors is not close to 0 and π. Secondly, When the angles are too small and too large with respect to 0 and π, the negative impact of oversize angle on the positioning accuracy is greater than the oversize angle. Finally, two methods for obtaining the positioning error covariance The equivalence. The simulation results verify the above problems and point out that the conclusion of this paper can be applied to the multi-station passive location algorithm based on sensor management.