收稿日期: 2015-09-08
修回日期: 2016-03-22
网络出版日期: 2016-07-30
基金资助
国家自然科学基金(No.61202394)资助
Anti-jamming Algorithm of Space-Time AdaptiveFiltering for GPS Based on MatrixReconstruction
Received date: 2015-09-08
Revised date: 2016-03-22
Online published: 2016-07-30
杨琼, 张怡, 唐成凯, 何伟 . GPS空时自适应滤波矩阵重构抗干扰算法[J]. 应用科学学报, 2016 , 34(4) : 380 -386 . DOI: 10.3969/j.issn.0255-8297.2016.04.003
Global positioning system (GPS) anti-jamming algorithms suffer from severe performance degradation in the presence of covariance matrix estimation errors due to small snapshots, jamming movement and antenna vibration. In view of this problem, we present an anti-jamming algorithm of space-time adaptive filtering based on covariance matrix reconstruction. In this algorithm, the covariance matrix that includes noise and interference is reconstructed using the Capon spectral estimation method. The matrix is smoothed in the time domain to obtain space-time filter weights, thus helping reduce the influence of array errors. We analyze three aspects of the algorithm performance: space frequency response spectrum, different signal-to-noise ratio and different number of snapshots. Simulation results show that the proposed algorithm can suppress both wideband and narrowband interferences, improve signal-to-interference-plus-noise ratio of the array output under the condition of low signal-to-noise ratio and low level of snapshots. The output signal-to-interference-plus-noise ratio is improved by 5 dB, better than the diagonal loading algorithm and the covariance matrix taper algorithm.
[1] Xu Y G, Ma J Y, Liu Z W. A class of diagonally loaded robust capon beamformers for noncircular signals of interest [J]. Signal Processing, 2014, 94 (6): 670-680.
[2] 董玫, 苏洪涛, 郑巧珍, 陈伯孝. 基于脊参数估计的对角加载系数的选取[J]. 电子学报, 2014, 42(10): 2098-2103. Dong M, Su H T, Zheng Q Z, Chen B X. Computation of diagonal loading level for robust beamforming via ridge regression [J]. Acta Electronica Sinica, 2014, 42(10): 2098-2103. (in Chinese)
[3] Liu L, Zhang Z L, Wang L. Robust SFAP anti-jamming algorithm based on generalized sidelobe cancellation [C]//China Satellite Navigation Conference, 2015, 56 (3): 795-804
[4] Tivive F H C, Bouzerdoum A. A subspace projection approach for wall clutter mitigation in through-the-wall radar imaging [J]. IEEE Transactions on Geoscience and Remote Sensing, 2015, 53(4): 2108-2122
[5] Wu S X, Huang Y B, Tian F. A GNSS space-time anti-jamming algorithm based on convex optimization [C]//China Satellite Navigation Conference, 2014, 56 (3): 725-738
[6] Zhu S Q, Liao G S. Robust space-time adaptive processing with colored loading using iterative optimization [J]. Digital Signal Processing, 2014(9): 14-20.
[7] 范展, 梁国龙. 基于干扰协方差矩阵重构的恒定束宽鲁棒自适应波束形成[J]. 声学学报, 2015, 40(1): 104-109 Fan Z, Liang G L. Frequency-invariant robust adaptive beamforming based on interference covariance matrix reconstruction [J]. Acta Acustica, 2015, 40(1): 104-109. (in Chinese)
[8] Lu Z X, Li Y J. Interference covariance matrix reconstruction via steering vectors estimation for robust adaptive beamforming [J]. Electronics Letters, 2013, 49(22): 1373-1374
[9] Gu Y J, Leshem A. Robust adaptive beamforming based on interference covariance matrix reconstruction and steering vector estimation [J]. IEEE Transactions on Signal Processing, 2012, 60(7): 3881-3885.
[10] Mu P C, Li D. Robust MVDR beamforming based on covariance matrix reconstruction [J]. Science China: Information Sciences, 2013, 56(4): 1-12.
[11] Gan L, Yi Z W. Automatic computation of diagonal loading factor for robust adaptive beamforming based on Gaussian distribution [J]. International Journal of Electronics and Communications, 2013, 67(6): 570-573.
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