一种自适应网格细化的卫星干扰源定位方法  

Interference Source Positioning Method of Satellites Based on Adaptive Mesh Refinement

作　　者：任洋 姚金杰[1] 赵昶淳 REN Yang;YAO Jinjie;ZHAO Changchun(Shanxi Key Laboratory of Signal Capturing&Processing,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息探测与处理山西省重点实验室,太原030051

出　　处：《火力与指挥控制》2024年第8期152-158,165,共8页Fire Control & Command Control

基　　金：山西省重点研发计划基金资助项目(202102010101002)。

摘　　要：针对目前使用固定网格分辨率的直接定位(DPD)方法对卫星导航干扰源进行定位时,定位精度较低、计算复杂度高的问题,提出一种自适应网格细化的直接定位方法。使用差分匹配滤波器得到TOA的粗估计值,缩小定位区域,得到干扰源位置粗估计,使用迭代网格细化,得到高精度的定位结果。仿真实验表明,在低信噪比情况下,定位精度较传统两步定位提高90%;20 m网格分辨率下,较DPD定位方法其计算复杂度降低了24倍。Aiming at the problem of low positioning accuracy and high computational complexity with the direct positioning method with fixed grid resolution to position satellite navigation interference sources,a direct positioning method of adaptive mesh refinement is proposed.Firstly,the differential matching filter is used to obtain the rough estimate of TOA,the positioning area is narrowed,and the initial interference source position is obtained by coarse estimation,and then the iterative mesh refinement is used to obtain the high-precision positioning result.Simulation results show that the positioning accuracy of this method can be improved by 90%compared with the traditional two-step positioning under the condition of low signal-to-noise ratio;at 20 m grid resolution,the computational complexity is reduced by 24 times compared with the DPD positioning method.

关 键 词：卫星导航系统 直接定位 自适应网格细化 干扰源定位 网格分辨率 

分 类 号：TN911.7[电子电信—通信与信息系统]