基于二维单基线的单星高精度无源定位算法

High precision passive localization by single satellite observer using two-dimensional single baseline

针对长短基线干涉仪定位系统设备量大、系统复杂的问题,提出了基于运动学原理的单星高精度无源定位技术。以模糊相位差和相位差变化率为观测量,并采用三通道二维单基线阵列构型,充分利用长基线相位差定位精度高的特点,并结合相位差变化率的无模糊特性,通过粒子群改进算法实现高精度的定位。仿真结果表明,该算法定位精度高,定位性能接近CRLB。

Due to the large equipment and the complex structure of multi baseline interferometers, a new high precision passive location by single satellite observer based on particle kinematics is proposed. In view of the unambiguous specialty of the phase rate of changing and the high precision in direction of the long baseline phase differences, the ambiguous phase difference and the changing rate of phase difference are used in this al- gorithm. The particle swarm optimization algorithm is improved to accomplish the high precision passive lo- calization. The simulation results show that this method can attain the CRLB.