基于观测站精确距离信息的多站时差定位方法  

Positioning method using time difference measurements from multi-station based on precise distance information of observation stations

作　　者：邓杏松 亓亮 朱元江 杨帆 蒋智辰 刘志永 DEND Xingsong;QI Liang;ZHU Yuanjiang;YANG Fan;JIANG Zhichen;LIU Zhiyong(School of Electronic Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;No.723 Institute of China State Shipbuilding Corporation Limited,Yangzhou 225101,China;School of Information Science and Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京210016 [2]中国船舶集团有限公司第七二三研究所,江苏扬州225101 [3]东南大学信息科学与工程学院,江苏南京210096

出　　处：《系统工程与电子技术》2024年第8期2592-2599,共8页Systems Engineering and Electronics

摘　　要：对于空中机动平台,观测站位置误差的存在,使得传统时差定位方法的精度不能满足高精度定位需求。针对观测站位置误差下的多站时差定位问题,提出一种基于观测站精确距离信息的高精度时差定位方法。不同于传统的两步加权最小二乘(two step weighted least squares,TS-WLS)算法,该算法在加权最小二乘时直接对目标位置估计的误差进行估计,避免了开方、平方等非线性运算。仿真实验结果表明,引入观测站精确距离信息能够大幅提升目标定位精度,所提算法具有较强的噪声适应能力,能够在观测站位置误差较大的情况下实现高精度时差定位。For aerial maneuvering platforms,the presence of observation stations position errors makes the positioning accuracy of traditional time difference positioning methods unable to meet the high-precision positioning requirements.In view of the problem of multi-station time difference positioning with observation stations position errors,a high-precision time difference positioning method based on precise distance information of observation stations is proposed.Unlike the traditional two step weighted least squares(TS-WLS)algorithm,the proposed algorithm directly estimates the error of target position estimation in weighted least squares step,avoiding nonlinear operations such as square and square root.Simulation experiment results show that introducing precise distance information from observation stations can significantly improve the accuracy of target positioning and the proposed algorithm has strong noise adaptability and can achieve high-precision time difference positioning in the case of large observation station position errors.

关 键 词：到达时差 两步加权最小二乘 泰勒级数展开 伪线性方程 

分 类 号：TN91[电子电信—通信与信息系统]