基于多重广义Hough变换的多星时频差联合定位方法  

Multi-satellite TDOA/FDOA Joint Positioning Method Based on Multiple Generalized Hough Transform

作　　者：孙哲 霍立寰 柏如龙[2,3] 陈兵 马飞[2] 江漫[2] SUN Zhe;HUO Lihuan;BAI Rulong;CHEN Bing;MA Fei;JIANG Man(Haizhuang Military Representative Office in Handan,Handan 056000,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China;Hebei Key Laboratory of Electromagnetic Spectrum Cognition and Control,Shijiazhuang 050081,China)

机构地区：[1]海装驻邯郸地区军事代表室,河北邯郸056000 [2]中国电子科技集团第五十四研究所,河北石家庄050081 [3]河北省电磁频谱认知与管控重点实验室,河北石家庄050081

出　　处：《无线电工程》2021年第11期1284-1288,共5页Radio Engineering

基　　金：河北省重大科技成果转化专项基金资助项目(14040322Z)。

摘　　要：卫星无源定位技术通过被动接收干扰源的辐射信号进行目标定位,具有隐蔽性好、抗干扰能力强的优点。随着卫星运行轨迹和速度的变化,单一的时差(TDOA)或频差(FDOA)定位总是存在不可定位时段。针对这一问题,提出了一种基于多重广义霍夫变换(GHT)的多星时频差联合定位方法。构建了多星时频差的联合定位模型,将定位方程基于广义霍夫变换进行映射,同时采用多重递进变换的方法,提高处理效率。根据各个邻星与主星构成的双星时频差定位模型,基于理论定位几何稀释度(GDOP)进行加权融合,获得多星时频差联合定位的代价函数。验证结果表明,所提方法能够获得优于多时差和多频差的定位结果,对于定位时段、测量误差具有良好的稳健性。Passive satellite positioning techniques determine the positions of targets by receiving the radiation signals from the interference sources passively,with the advantages of concealment and strong anti-interference capability.As the trajectory and speed of satellites vary,single Time Difference of Arrival(TDOA)or Frequency Difference of Arrival(FDOA)method is always unable to realize positioning in some time periods.To solve this problem,a multi-satellite TDOA/FDOA joint positioning method based on Generalized Hough Transform(GHT)is proposed.A joint positioning model of multi-satellite TDOA/FDOA is constructed,in which the positioning equation is mapped based on the GHT.The method of multiple progressive transforms is adopted to improve the processing efficiency.According to the dual-satellite TDOA/FDOA positioning model formed by each neighboring satellite and main satellite,the weighted cost function of multi-satellite TDOA/FDOA joint positioning is obtained based on the Geometric Dilution Precision(GDOP).The verification results show that the proposed method can obtain better positioning results than the method of multiple TDOAs or FDOAs,and has good robustness in positioning time period and measurement errors.

关 键 词：干扰源定位 广义霍夫变换 时频差联合定位 

分 类 号：TN9112[电子电信—通信与信息系统]