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| Spoofing Mitigation Method for Navigation Receiver Based on Cross Correlation and Projection |
| WANG Chun① ZHANG Linrang② |
①(College of Information and Control Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)
②(National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China) |
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Abstract Since spoofing send similar navigation satellites C/A code, this kind of interferences can lead to the receiver misled easily, receiver will provide a wrong location information. Considering both navigation signal and spoofing with same navigation signal structure has high self-coherence characteristic, and the power of spoofing is a little higher than authentic signal, this paper proposes a blind spoofing suppression method based on array antenna. Firstly, a cross-correlation matrix is obtained by cross-correlation processing between receive data from multiple antennas and its own delayed reference data. Secondly, the orthogonal projection matrix of interference can be got by the cross-correlation matrix. Finally, the eigenvector corresponding to the biggest eigenvalue from the projected cross-correlation matrix is taken as the optimal weight. Without having known the direction of authentic signal and interference, this method avoid despreading by searching each satellite C/A code sequence before receive. Experimental results show that the array beam can effectively suppress interference with high SNR and receiver performance has no effect by the spoofing.
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Received: 10 October 2015
Published: 24 June 2016
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| Fund: The National Natural Science Foundation of China (61373112, 61473216), The Specialized Research Fund for the Doctoral Program of Higher Education(20126120110008), The Natural Science Basic Research Plan in Shaanxi Province of China (2013JQ8003) |
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Corresponding Authors:
WANG Chun
E-mail: wangchun01@126.com
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