基于外辐射源的空中目标直接定位算法  

Direct localization algorithm of the aerial target based on external radiation source

作　　者：夏楠 高丹阳 邢宝辉 王亚宁 XIA Nan;GAO Danyang;XING Baohui;WANG Yaning(School of Information Science and Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学信息科学与工程学院,辽宁大连116034

出　　处：《通信学报》2023年第6期117-124,共8页Journal on Communications

基　　金：教育部产学合作教育基金资助项目(No.220603231024713)。

摘　　要：为了提高空中目标定位的准确性并保证其隐蔽性,提出一种基于外辐射源的空中目标直接定位算法。利用固定广播信号作为发射源,对经过空中目标散射的信号进行多站接收,建立同步采集的多维基带信号和目标位置坐标的直接联系,并构造空间互谱函数和联合匹配函数。通过迭代式谱峰搜索,获得对空中目标的优化定位,并能够有效抑制地面直达波和多径信号的干扰。仿真结果表明,所提算法在低信噪比情况下性能优于传统两步定位法和其他直接定位方法,能够实现三维空中目标的高精度定位。In order to improve the accuracy of aerial target location and ensure its concealment,a direct location algorithm of the aerial target based on external radiation source was proposed.Fixed broadcast signals were used as transmitting sources,and the signals scattered by the aerial targets were received by multiple receivers.A direct relationship between the synchronized multi-dimensional baseband signals and the position coordinates of the target was established,and then the spatial cross-spectrum function and joint matching function were constructed.Through iterative spectral peak search,the positioning results of the aerial target could be optimized,and the impact of direct signals and multipath signals on the ground could be effectively suppressed.Simulation results show that the performance of the proposed algorithm is better than that of the traditional two-step localization method and other direct localization methods in the case of low signal-to-noise ratio(SNR),and it can achieve high-precision localization of the three-dimensional mobile target.

关 键 词：外辐射源 直接定位 空间互谱函数 联合匹配函数 多径干扰抑制 

分 类 号：TN911.72[电子电信—通信与信息系统]