单星卫星通信终端定位技术研究  

Satellite Communication Terminal Location Technology Research Based on Single Satellite

作　　者：李立峰[1,2] 江漫[1,2] 陈兵[1,2] 

机构地区：[1]装备工程技术研究实验室,河北石家庄050081 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2017年第4期71-74,共4页Radio Communications Technology

摘　　要：针对传统的双星或三星定位技术主要应用于地面固定站,需要存在重叠的主邻星波束覆盖范围,必须有匹配的邻星等局限,提出了单星定位技术,主要对无匹配邻星以及处在点波束内的目标进行定位。将观测平台抵近目标波束,同时接收目标上行旁瓣信号和卫星下行信号,利用方向信息和时差信息,解算目标位置,将结果进行扩展卡尔曼非线性滤波,实现对卫星通信终端的定位。仿真结果表明,该算法大大提升了测向/时差联合定位的精度。Traditional dual-satellite and triple-satellite location technology is usually used for ground fixed station location,which requires overlapped beam coverage area from main satellite and neighboring satellite. And a matched neighboring star is needed. To mitigate this limitation,a solution of single satellite positioning is proposed to solve the problem which no neighboring satellite exist or the target is contained in spot beam. By approaching into the target＇s beam,observation platform firstly utilizes directional information and TDOA information from the received upward sidelobe signal and downward signals of satellite,and calculates the position information of the target,and then combines with EKF nonlinear filtering to locate the target. Finally,computer simulation indicates that DOA/TDOA joint location algorithm can improve location accuracy greatly.

关 键 词：方向信息 时差 卫星通信终端定位 扩展卡尔曼滤波 

分 类 号：TN911.2[电子电信—通信与信息系统]