基于方位多假设的单基线干涉仪定位方法  

Single-baseline interferometer positioning method based on azimuth multiple hypothesis

作　　者：邢怀玺 吴华[1] 陈游[1] 张景轩 XING Huaixi;WU Hua;CHEN You;ZHANG Jingxuan(Aeronautics Engineering College,Air Force Engineering University,Xi’an 710038,China;Department of Automotive Engineering,Hefei Technology College,Hefei 238000,China)

机构地区：[1]空军工程大学航空工程学院,西安710038 [2]合肥职业技术学院汽车工程学院,合肥238000

出　　处：《北京航空航天大学学报》2021年第5期1049-1057,共9页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：为了解决机载单站无源定位系统中一维单基线干涉仪测量相位差信息的模糊问题,改进仅利用相位差变化率定位方法,将模糊相位差作为有效的定位参数,提出一种基于方位多假设的单基线干涉仪定位方法。利用模糊相位差和相位差变化率初始化辐射源目标的可能距离方位信息,并通过高斯-扩展卡尔曼滤波(GS-EKF)算法解算辐射源目标位置。所提方法克服了仅利用相位差变化率定位受观测平台机动影响的缺陷,有效缩短了定位时间,同时不必考虑解相位模糊,定位性能均优于仅利用相位差或相位差变化率的定位方法,在实际工程运用中可以降低设备复杂度和成本。In order to solve the problem of ambiguity of phase difference information measured by onedimensional single-baseline interferometer in an airborne single-station passive positioning system,the positioning method that measures only the phase difference change rate is improved,and the fuzzy phase difference is used as an effective positioning parameter.And a single-baseline interferometer phase measurement and positioning method based on azimuth multiple hypotheses is proposed.The possible distance and azimuth information of the radiation source target is initialized using the fuzzy phase difference and the phase difference change rate,and the target location of the radiation source is solved by the Gauss-Extended Kalman Filter(GS-EKF)algorithm.This method overcomes the shortcomings of using only the phase difference change rate to locate the impact of the maneuver of the observation platform,effectively shortens the positioning time,and does not need to consider the solution of phase ambiguity.Its positioning performance is superior to the positioning method that only measures the phase difference or the phase difference change rate.In practical engineering applications,this method can reduce equipment complexity and cost.

关 键 词：无源定位 单基线 相位差 相位差变化率 高斯-扩展卡尔曼滤波(GS-EKF) 

分 类 号：TN971[电子电信—信号与信息处理]