一种引入目标运动速度的多站无源时差定位方法

在多站测角的被动目标跟踪中,目标的状态与角度量测值之间存在非线性关系,现有的方法主要是对其进行线性化,但线性化过程会带来滤波精度的下降,甚至会产生滤波发散而丢失目标。针对这一问题提出一种新方法,由于利用多普勒测速原理可以获得目标运动速度,因此将目标运动速度引入量测方程中,通过附加独立信息观测通道以期提高目标跟踪的收敛精度和收敛速度。仿真结果证实会使滤波算法收敛速度加快,收敛精度提高,改善跟踪性能。

A Multi-sensor Passive TDOA Target Tracking Algorithm Adopted Target's Velocity

In multi-sensor bearings-only passive target tracking,the state of the target has a nonlinear relation with the bearings measurements.Existing methods focus mainly on the process of linearization.However,in this process,a precision decrease is obviously unavoidable and even filter divergence will occur so as to lose the target.Therefore a new algorithm is proposed.Because target's velocity can be measured by doppler principle,so the target's velocity is adopted in the measurement equation and a new kalman f...