| 多星TDOA和FDOA联合定位精度分析 |
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| 引用本文： | 朱伟强,黄培康,束锋,马琴.多星TDOA和FDOA联合定位精度分析[J].系统工程与电子技术,2009,31(12):2797-2800. |
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| 作者姓名： | 朱伟强 黄培康 束锋 马琴 |
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| 作者单位： | 1． 南京电子设备研究所， 江苏 南京 210007；2． 中国航天科工防御技术研究院科技委， 北京 100854；3． 南京理工大学电光学院通信工程系， 江苏 南京 210094 |
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| 摘 要： | 推导了多星时差频差联合定位体制的定位误差下界(Cramér Rao lower bound, CRLB)，并给出CRLB能达到的最小值及其充要条件，该充要条件可用于设计卫星构型。与采用GDOP(geometric dilution of precision)衡量联合定位性能方法相比，CRLB更能精确地反映多星时差频差联合定位的性能。理论分析及仿真实验证明了联合定位比单独利用时差或频差定位可以取得更高的定位精度。
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| 关 键 词： | 时差 频差 定位 克拉美罗下界 |
Analysis of precision of multi-satellite joint location based on TDOA/FDOA |
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| ZHU Wei-qiang,HUANG Pei-kang,SHU Feng,MA Qin.Analysis of precision of multi-satellite joint location based on TDOA/FDOA[J].System Engineering and Electronics,2009,31(12):2797-2800. |
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| Authors: | ZHU Wei-qiang HUANG Pei-kang SHU Feng MA Qin |
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| Institution: | 1. Nanjing Electronic Equipment Inst., Nanjing 210007, China; 2. Science Technology Community, Defense Technology Academy, China Aerospace Science and Industry Corporation, Beijing 100854, China; 3. Dept. of Communication Engineering, Coll. of Electronic and Optical Technology, ;
Nanjing Univ. of Science and Technology, Nanjing 210094, China |
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| Abstract: | Cramér-Rao lower bound (CRLB) is derived for multi-satellite passive location based on time difference of arrival (TDOA) and frequency difference of arrival (FDOA) and its necessary and sufficient condi-tions are given.These conditions can be used to design an optimal shape of satellite array.Compared with geo-metric dilution of precision (GDOP),CRLB can better evaluate the performance of joint passive location.Both theory analysis and simulation prove the fact that the joint TDOA/FDOA location performs better than any one of TDOA and FDOA. |
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| Keywords: | time difference of arrival frequency difference of arrival location Cramer-Rao lower bound |
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