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针对传统干涉仪测向定位在低信噪比(SNR)下性能降低、多频段系统复杂等缺点,本文直接利用运动单站干涉仪模糊相位差(PD)实现对地面静止辐射源定位。为解决该定位问题,结合干涉仪相位差的几何特性,提出了一种多角度距离参数化高斯和滤波(MB-RP-GMF)定位解算方法,利用相位差误差检测获得多个初始方位角,通过距离参数化得到一组滤波初始值,采用扩展卡尔曼滤波(EKF)进行定位计算。仿真结果表明,该定位方法在低信噪比下优于仅测向(BO)定位,且仅采用一组干涉仪便可对多个频段辐射源进行定位。
In order to reduce the performance of traditional interferometer in low signal-to-noise ratio (SNR) and complexity of multi-band system, this paper directly uses the stationary phase interferometer (PD) of moving single interferometer to locate the stationary source. In order to solve the localization problem, a multi-angle distance parametric Gaussian and filtering (MB-RP-GMF) localization method is proposed based on the geometric characteristics of the phase difference of the interferometer. Multiple initial azimuth angles , A set of initial values of filtering is obtained through distance parameterization, and extended positioning Kalman filter (EKF) is used for positioning calculation. The simulation results show that the proposed method is better than BO only at low signal-to-noise ratio (SNR), and only one set of interferometer can locate multiple radiation sources.