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| 基于非线性最小二乘的三星座时差定位综合算法 | |
| 引用本文： | 李悦,柳征,伍渝江.基于非线性最小二乘的三星座时差定位综合算法[J].电讯技术,2010,50(3). |
| 作者姓名： | 李悦 柳征 伍渝江 |
| 作者单位： | 1. 兰州大学数学与统计学院,兰州,730000;解放军61541部队,北京,100094 2. 国防科技大学电子科学与工程学院,长沙,410073 3. 兰州大学数学与统计学院,兰州,730000 |
| 摘 要： | 提出一种基于非线性最小二乘(NLS)的三星座时差定位综合算法.该算法不使用WGS-84椭球模型作为定位约束条件,通过对卫星过顶前后的两组弱观测数据进行综合、配对处理,实现对目标的精确定位.仿真结果表明,该方法不仅对弱观测数据具有较好的定位精度,而且不受目标高程约束,当目标高程不确定时,仍具有稳健的定位效果. |
| 关 键 词： | 星座 时差定位 极大似然估计 非线性最小二乘 |
Integration Algorithm of Three-Satellite Constellation TDOA Location Based on NLS |
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| LI Yue,LIU Zhen and WU Yu-jiang.Integration Algorithm of Three-Satellite Constellation TDOA Location Based on NLS[J].Telecommunication Engineering,2010,50(3). | |
| Authors: | LI Yue LIU Zhen and WU Yu-jiang |
| Affiliation: | School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000,Chin a;National University of Defense Technology, Changsha 410073,China;School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000,China |
| Abstract: | This paper presents an integration algor ithm of three-satellite constellation TDOA location based on nonlinear least squ are(NLS), which is not constrained by WGS-84 ellipsoid model. Through fusing and matching with the two groups of weak observational data produced by the satelli te when entering or leaving the reconnaissance region, this algorithm can obtain precise location of the target. Simulation results show that the proposed algor ithm not only has better location performance with weak observational data, but also is relatively more insensitive to the target height. |
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