一种利用相位差变化率的机载单站无源定位方法

利用空频域信息的无源定位对角速度测量要求较高，分析相位差变化率模型可知相 位差变化率对角速度具有明显的放大作用，将其应用于机载单站无源定位，建立新的无源测 距模型并进行误差分析。仿真实验表明：该方法减小了参数测量难度，定位误差主要受相位 差变化率和频率变化率影响，并随载机和目标相对速度的增大而减小，与原方法相比具有更 好的定位精度。

An airborne single observer passive location using phase difference rate-of-change

The passive location by using spatial frequency domain information mak es high demand for measurement precision of angular velocity. Analysis of phase difference rate of change model indicates that phase difference rate of cha nge can obviously magnify angular velocity. This characteristic is applied to airborne single observer passive location,and a new passive location m odel is built and error analysis is made. The simulation shows that this method reduces the difficulties of parameter measurement. The ranging error is mainly affected by the measurement error of phase difference rate of change and Doppler frequency rate of change, and it reduces with the increase of relative velocity between ob server fighter and target. Compared with former method, it has higher passive l ocation precision.