| 基于空时盲参数估计的GPS多径干扰抑制 |
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| 引用本文： | 狄旻珉,张尔扬.基于空时盲参数估计的GPS多径干扰抑制[J].宇航学报,2006,27(12):113-115. |
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| 作者姓名： | 狄旻珉 张尔扬 |
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| 作者单位： | 国防科技大学电子科学与工程学院,长沙410073 |
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| 摘 要： | 高精度GPS测量定位的主要误差源是多径效应，对系统精度的影响很大，因此提出了一种基于CDMA盲参数估计的方法。首先通过盲参数估计计算出直接信号和多径信号的时延和角度向量，然后通过空时处理对多径信号进行抑制。该方法通过了理论分析和仿真实验的验证。结果表明采用该方法的多径误差约为原来的35％。
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| 关 键 词： | GPS 多径 空时处理 盲参数估计 |
| 收稿时间： | 09 12 2005 12:00AM |
| 修稿时间： | 04 4 2006 12:00AM |
GPS Multipath Effect Mitigation Based on Blind Parameters Estimation |
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| DI Min-min, ZHANG Er-yang,.GPS Multipath Effect Mitigation Based on Blind Parameters Estimation[J].Journal of Astronautics,2006,27(12):113-115. |
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| Authors: | DI Min-min ZHANG Er-yang |
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| Institution: | College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China |
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| Abstract: | Multipath effect is the major error source of GPS, the result is intolerable. So a method based on blind parameters estimation to mitigate it is suggested. First, the time delay and direction of arrival of direct signal and multipath interferences were estimated, then space-time adaptive processing was utilized to eliminate interferences. Theoretical analysis and simulations supported the method. The results prove that its error is 35 percent of the original one. |
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