Abstract
LFM interference is a typical non-stationary interference, which is common in the application of satellite navigation receiver. The normal SFAP does not distinguish the characteristics of received signals, and uniformly carries out covariance matrix estimation, weight calculation and adaptive filtering in each frequency bin, which may attenuate the performance of LFM interference suppression. To solve this problem, a SFAP algorithm based on short-time Fourier transform (STFT) was proposed. Firstly, the time-frequency characteristics of the received data were analyzed by short-time Fourier transform. Then the sampled data were grouped in two-dimensional time and frequency domain according to their time-frequency characteristics, and the sampled data with consistent time-frequency characteristics were divided into the same group. Finally, the covariance matrix estimation, weight calculation and adaptive filtering were carried out by using the grouped data to improve the interference to noise ratio, the null depth and the anti-interference ability. Both theoretical analysis and simulation results verify the effectiveness of the algorithm.
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References
Fante, R.L., Vaccaro, J.J.: Wideband cancellation of interference in a GPS receive array. IEEE Trans. Aerosp. Electron. Syst. 36(2), 549–564 (2000)
Moore, T.D.: Analytic study of space-time and space-frequency adaptive processing for radio frequency interference suppression. The Ohio State University, Columbus, USA (2002)
Gupta, I.J., Moore, T.D.: Space-frequency adaptive processing (SFAP) for radio frequency interference mitigation in spread-spectrum receivers. IEEE Trans. Antennas Propag. 52(6), 1611–1615 (2004)
Yongliang, W., Qianjun, D., Rongfeng, L.: Adaptive Array Processing. Tsinghua University Press, Beijing (2009)
Liu, P., Tang, D., Chen, Y., et al.: An evaluating method of the precision of the antenna array’s covariance matrix estimation based on the decomposition of eigenspace. In: China Satellite Navigation Conference (2016)
Zhang, Y., Weifeng, M., Amin, M.G.: Subspace analysis of spatial time-frequency distribution matrices. IEEE Trans. Signal Process. 49(4), 747–759 (2001)
Qian, S., Chen, D.: Decomposition of the Wigner-Ville distribution and time-frequency distribution series. IEEE Trans. Signal Process. 42(10), 2836–2842 (1994)
Xianghong, T., Qiliang, L.: Time-Frequency Analysis and Wavelet Transform, 2nd edn. Science Press, Beijing (2016)
Fang, Z., Huan, Z., Ming, X.: A space-time-frequency adaptive processing anti-jamming algorithm. Electron. Opt. Control. 14(1), 48–51 (2007)
Zhang, Y., Amin, M.G.: Array processing for nonstationary interference suppression in DS/SS communications using subspace projection techniques. IEEE Trans. Signal Process. 49(12), 3005–3014 (2001)
Ying, L., Chi, X.: Improved sidelobe cancellation algorithm for wideband beamforming based on wavelet. J. Univ. Electron. Sci. Technol. China 47(1), 25–29 (2018)
Ying, L., Chi, X.: Broadband signal beamforming algorithm based on the wavelet and time delay estimation. J. Univ. Electron. Sci. Technol. China 47(2), 183–188 (2018)
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Liu, P., Wang, D., Ren, Q., Tang, D., Peng, B. (2022). Space-Frequency Adaptive Processing Algorithm Based on STFT for LFM Interference Suppression. In: Yang, C., Xie, J. (eds) China Satellite Navigation Conference (CSNC 2022) Proceedings. CSNC 2022. Lecture Notes in Electrical Engineering, vol 909. Springer, Singapore. https://doi.org/10.1007/978-981-19-2580-1_40
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DOI: https://doi.org/10.1007/978-981-19-2580-1_40
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