时差定位中解高重频信号定位模糊研究

A Study on Eliminating Location Ambiguity of High PRF Signals in Time-difference Location System

时差定位体制由于定位精度较高得到广泛应用,但长基线定位系统存在高重频信号的定位模糊问题。针对该问题,根据目标运动引起的径向偏移对到达时间产生微量调制这一规律,提出了径向微量偏移法,并讨论该方法的适用性,给出了算法相关处理流程。仿真结果表明,在目标具备一定径向速度分量时,该方法可以在较短时间内有效解定位模糊。

Time-difference location system is widely applied because of its high precision,but the problem of high PRF signals location ambiguity is found in long base line location system.To eliminate location ambiguity,the range migration method is proposed based on the fact that target movement causes the range migration which leads to tiny modulation of TOA,and it is also discussed applicability and the relevant processing procedure is provided.Simulation results show that when target possesses certain range velocity component,location ambiguity can be efficiently solved in relative short time using this method.