| 摘要: |
| 双星时差（Time Difference of Arrival，TDOA）频差（Frequency Difference of Arrival，FDOA）定位系统在过顶期间可多次截获到辐射源信号并进行定位，将不同时刻观测的多组时差频差和高程信息融合可以提高定位精度。本文算法将辐射源高程信息建模为双星时差频差定位融合的观测量之一，并提出了一种基于高斯-牛顿（Gauss-Newton，G-N）迭代的双星时差频差定位融合算法。最后通过实验仿真将本文所提算法与理论最优单次定位结果、直接平均和加权平均等位置合批处理方法进行比较，实验结果表明本文算法相较于其他位置合批处理方法具有更优越的性能。 |
| 关键词: 双星 到达时间差 到达频率差 定位 融合 |
| DOI：DOI:10.3969/j.issn.1672-2337.2022.01.014 |
| 分类号:TN971 |
| 基金项目:国家自然科学基金（No.61901494）；国防科技大学科研计划项目（No.ZK20-26） |
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| Dual-Satellite Localization Fusion Algorithm of TDOA and FDOA Based on G-N Iteration |
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XU Yingjie，ZHANG Min，ZHANG Wenjun，WU Guizhou，GUO Fucheng
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College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China
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| Abstract: |
| Dual-satellite localization system using time difference of arrival (TDOA) and frequency difference of arrival (FDOA) can receive the source signal and locate it multiple times during the overpass. The fusion of multiple sets of TDOAs, FDOAs and altitude information observed at different times can improve the accuracy of localization. This paper models the prior altitude information of the radiation as one of the observations of dual-satellite localization fusion algorithm of TDOA and FDOA, and proposes a dual-satellite localization fusion algorithm of TDOA and FDOA based on Gauss-Newton(G-N) iteration. Finally, the proposed algorithm is compared with the theoretical optimal single localization result, the direct averaging algorithm and the weighted averaging algorithm through experimental simulation. The experimental results show that the proposed algorithm has higher accuracy of localization than other methods. |
| Key words: dual-satellite time difference of arrival frequency difference of arrival localization fusion |
