对运动目标的单站无源定位技术研究

实现对运动目标辐射源的单站无源定位是对新体制雷达对抗侦察系统的基本要求.固定单站通过测量角度、角速度和多普勒频率变化率可实现对运动目标的无源定位,该方法对角速度特别敏感,测量精度要求很高.为此,提出了一种利用波达方向、相位差变化率、载波频率及多普勒频率变化率的单站无源定位方法,结合某地面雷达对抗侦察系统,分析了其定位原理、测距误差和可观测性,给出了单次测距的计算机仿真结果和结论.仿真研究表明,通过增加相位差变化率信息降低了对角速度的高精度测量要求.

Research on Single Observer Passive Location Technology for Moving Targets

It is an elementary requirement to a new-type radar counter reconnaissance system to realize single observer passive location of moving targets.A fixed single observer can realize the passive location of a moving target by using angle,angular velocity and Doppler frequency rate-of-change information.But this method is very sensitive to angular velocity and requests high measuring accuracy.A single observer passive location method is proposed by using direction of arrival,phase difference rate-of-change,frequency and Doppler frequency rate-of-change in this paper.Associating with a certain fixed radar counter reconnaissance system,location theory,ranging error and observability are analyzed.Computer simulation of single measurement and its conclusion are given.The simulation and research show that this method reduces the requirement of angular velocity by adding phase difference rate-of-change information.