摘要
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。
Due to the performance degradation under low SNR and complexity structures for multiple frequency bands using multi-channel phase interferometers, a novel single moving observer localization method for static ground emitter directly using interferometer ambiguous phase differences （PD） is proposed. To make use of the geometry characteristic of the PDs, a multiple bearing range parameterized Gaussian mixture filter （MB-RP-GMF） is advanced. Phase difference error is detec- ted to get a set of initial azimuths and then the range parameterized method is used to attain Gaussian mixtures. The emitter position is then estimated by the extended Kalman filter （EKF） banks. Simulation results show this method outperforms the traditional bearing-only （BO） methods under low SNRs; one set of baselines can be adapted for the multiple frequency band sources.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2013年第9期2185-2193,共9页
Acta Aeronautica et Astronautica Sinica
基金
国防科技重点实验室基金(9140C860304)
国家"863"计划(2011AA7072043
2011AA7072048)~~
关键词
无源定位
单站
干涉仪
相位差
卡尔曼滤波
高斯和
距离参数化
passive localization
single observer
interferometer
phase difference
kalman filter
gaussian mixture
rangeparameterized method
