基于径向加速度精估计的PSO单星无源定位

PSO Single Satellite Passive Localization Based on Radial Acceleration Accurate Estimation

针对传统单星无源定位方法定位精度较低的问题,文中提出一种基于径向加速度精估计的单星无源定位方法来实现单星对地球表面静止宽带信号辐射源定位。在通过测量脉冲到达时间(Time of Arrival,TOA)获得径向加速度精估计的算法基础上,采用粒子群优化(Particle Swarm Optimization,PSO)算法进行目标位置搜索,提高了定位精度,同时降低了计算量。分析并仿真了该方法定位误差与卫星状态参数、观测时长以及辐射源信号带宽、重频、持续时长等参数的关系。理论和仿真分析表明,该方法实现简单,计算量小,适用范围广,定位精度高。

Because of the low accuracy of the single satellite passive localization, a method for locating the static wideband signal emitter on the earth by using single satellite based on radial acceleration accurate estimation is proposed. Based on the researches of radial acceleration estimation from the time of arrival （TOA） measurements only, a localization method is proposed by using the particle swarm optimization （PSO） search technique. The relationship between position error and parameters such as satellite state, observation time and radiation signal parameters （ bandwidth, repetition frequency and duration time） is analyzed and simulated Theoretical analysis and computer simulation indicate that this localization method is easy to implement with small computation and could be widely used. And the performance of this method is excellent.