一种基于概率的双星无源定位算法

A Dual-satellite Passive Location Algorithm Based on Probability

针对双星无源定位系统采用时差、频差对地面固定辐射源进行无源定位的问题，提出了一种基于概率的双星无源定位算法。通过公式推导，将复杂的定位方程组化简为简单的二元一次方程组。在介绍定位原理的基础上对该算法进行仿真，通过仿真，分析了定位误差与时差测量精度、频差测量精度的关系。

The paper presents a dual-satellite passive location algorithm based on probability according to the issue how a dual-satellite passive positioning system locates passively a ground fixed emitter using TDOA （time difference of arrival） and FDOA （frequency difference of arrival）. A complicated equations set is simplified into a simple unitary quadratic equations set through formula derivation. The algorithm is simulated on the basis of introduction to location principles. The relationship between positioning accuracy and TDOA error and FDOA error is also analyzed.