Abstract
The GNSS is vulnerable so that it often faces the risk of jamming, and blanket jamming is one of the interference. Power inversion algorithm is a commonly method used to solve this problem, however, the receiver will lose lock when GNSS satellites are close to RFI sources. To improve the receiver’s anti-jamming performance in this harsh scene, a method of vector tracking loop (VTL) based on despread-respread (DR) algorithm is present. Firstly, this paper suppress oppressive interference. Secondly, local reference signal is reconstructed according to predicted tracking loop parameters. Thirdly, beamforming algorithm is present. Theoretical analysis and simulation experiments verify that the VTL based on DR algorithm can reduce phase discriminator output errors, improve receiver’s positioning performance, and has superior anti-jamming performance in harsh scene. The method proposed in this paper can be applied to arbitrary array without prior information of satellites’ directions and is not sensitive to the error of array. Copared to VTL based on EIG, VTL based on DR algorithm has lower complexity.
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Acknowledgements
The work of this paper is supported by the The National Key Research and Development Program of China (Grant No. 2016YFB0502402).
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Zhang, R., Wu, R., Jia, Q. (2018). A New Technique for Improving the Anti-jamming Performance of Vector Tracking Loop. In: Sun, J., Yang, C., Guo, S. (eds) China Satellite Navigation Conference (CSNC) 2018 Proceedings. CSNC 2018. Lecture Notes in Electrical Engineering, vol 498. Springer, Singapore. https://doi.org/10.1007/978-981-13-0014-1_1
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DOI: https://doi.org/10.1007/978-981-13-0014-1_1
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