| Citation: | SHI Pengliang, WANG Xiaoyu, XUE Ruiet al. Purification method of satellite navigation signal based on array antenna beamforming[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(10): 1906-1914. doi: 10.13700/j.bh.1001-5965.2021.0043(in Chinese)
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To satisfy the requirements of satellite navigation spoofing, a satellite navigation signals purification method is proposed based on the optimal design of the array digital beamforming. Firstly, a new covariance matrix is constructed and the disparity between the max eigenvalue and the minimum eigenvalue of the covariance matrix of the array received data is expanded by combing the direction information of non-object satellites, the layout information of the received array and the covariance matrix of the array received data. Secondly, the spatial filter weights that make the object satellite signal distortion-free while nullifying any non-object satellite signals are computed by using the constructed covariance matrix. At last, the purified satellite signals are obtained by weighting the array of received data. The correctness and effectiveness of the method proposed in this paper are validated by computer simulations.
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