| 基于多星时差定位精度分析 |
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| 引用本文： | 董钧祥,李勤. 基于多星时差定位精度分析[J]. 煤炭技术, 2010, 29(10) |
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| 作者姓名： | 董钧祥 李勤 |
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| 作者单位： | 云南国土资源职业学院,昆明,650217 |
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| 摘 要： | 利用矩阵理论和统计信号处理理论,推导了由于时差、卫星自定位和卫星速度等测量误差产生定位误差几何稀度(GDOP)公式。并以四星为例,在地固坐标系模型下给出了仿真结果。仿真表明:地球约束能显著提升定位精度;卫星自定位误差为10m时对卫星的定位精度影响较大。
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| 关 键 词： | 到达时差 误差几何稀度 Cramer-Rao下界 |
Accuracy Analysis of TDOA-based Multi-Satellite Passive Source Location |
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| DONG Jun-xiang,LI Qin. Accuracy Analysis of TDOA-based Multi-Satellite Passive Source Location[J]. Coal Technology, 2010, 29(10) |
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| Authors: | DONG Jun-xiang LI Qin |
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| Abstract: | Using matrix theory and statistical signal processing,the formula of GDOP(Geometric dilution of Precision) for passive source localization is derived,based on time differences of arrival(TDOA),satellite position,satellite speed.Take four satellites as an example,under Geographic coordinate system,simulation results indicate that Earth restraint can significantly improve location precision;when satellite position errors is 10 meters,have bigger effect on the lacation precision of satellite. |
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| Keywords: | TDOA GDOP CRLB |
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