基于相位差变化率的单站目标定位研究

摘要

Single observer target locating is an important task for air reconnaissance.A robust algorithm for single observer target locating based on phase difference rate of change is proposed in this paper.The target loca-tion can be worked out by using the Kalman filter model based on the azimuth angle of target signal and the phase changing difference at the same time.The Kalman filter model for calculating the phase difference rate of change is presented.And the IMM filter model is also given for raising the precision of target locating algorithm.In the experiment,the STK software is utilized for generating the platform position data,the signal azimuth data and the phase changing difference.In addition,the target locating result and the performance are also ana-lyzed.Finally,several constructive suggestions are made for practical engineering applications.%单站目标定位是电子侦察中的一项重要任务。针对实际工程特点，提出了一种鲁棒的运动单站相位差变化率目标定位算法。通过测量目标信号的方位角和相位差，利用卡尔曼滤波模型计算相位差变化率并对目标进行测距定位，最后将多次的定位结果进行交互多模滤波融合，实现对目标的高精度定位。给出了计算相位差变化率的滤波模型、目标定位算法，以及交互多模滤波的融合定位过程。仿真实验中采用 STK仿真软件生成单站平台的位置数据和目标信号入射方位角及相位差数据，分析了目标定位的效果及性能。最后给出了一些工程实践性的建议，具有一定的工程参考意义。