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论文:2016,Vol:34,Issue(6):1035-1039 |
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引用本文： |
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杨琼, 张怡, 唐成凯. 基于凸优化的鲁棒GPS空时抗干扰算法[J]. 西北工业大学学报 |
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Yang Qiong, Zhang Yi, Tang Chengkai. A Robust GPS Space-Time Anti-Jamming Algorithm Based on Convex Optimization[J]. Northwestern polytechnical university |
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| 基于凸优化的鲁棒GPS空时抗干扰算法 |
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| 杨琼, 张怡, 唐成凯 |
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| 西北工业大学 电子信息学院, 陕西 西安 710072 |
| 摘要: |
| 针对GPS空时抗干扰算法性能因方向矢量失配误差和协方差矩阵误差影响而下降的问题，提出了一种基于凸优化的鲁棒GPS空时抗干扰算法。该算法利用Capon空间谱估计重构噪声加干扰协方差矩阵，并通过凸优化方程得到修正方向矢量，最终得到空时滤波权值，降低了阵列误差和方向矢量误差的影响。从空频响应谱、失配情况和不同快拍数下的算法性能等三方面进行仿真分析比较，仿真结果表明文中所提出的方法对宽带干扰和窄带干扰均有良好的干扰抑制效果。在相同的快拍数下信干噪比更好，对方向矢量误差具有一定的鲁棒性。 |
| 关键词:
GPS
抗干扰
矩阵重构
凸优化
自相关
波束形成
约束最优化
MATLAB
波长
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| A Robust GPS Space-Time Anti-Jamming Algorithm Based on Convex Optimization |
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| Yang Qiong, Zhang Yi, Tang Chengkai |
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| School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| GPS space-time anti-jamming algorithms suffer from performance degradation in the presence of steering vector mismatch and covariance matrix estimation errors. We present a robust GPS space-time anti-jamming algorithm based on convex optimization. The algorithm reconstructs the noise pluse interference covariance matrix by Capon spectral estimation method and corrected the steering vector by convex optimization equations, finally gets the space-time filter weights, reduces the influence of array errors and steering vector mismatch. We analyze three aspects of algorithm performance which include space frequency response spectrum, mismatch cases and different number of snapshots. The simulation results show that the method can supress wideband interference and narrowband interference both well, has better signal to noise pluse interference ratio and is robust to steering vector errors. |
| Key words:
global positioning system
anti-jamming
matrix reonstruction
convex optimization
autocorrelation
beamforming
constrained optimization
MATLAB
wavelength
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| 收稿日期: 2016-04-20
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金（61202394）资助 |
| 通讯作者:
Email： |
| 作者简介: 杨琼(1988-),西北工业大学博士研究生,主要从事卫星通信抗干扰的研究。
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| 作者相关文章 |
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| 杨琼 在本刊中的所有文章 |
| 张怡 在本刊中的所有文章 |
| 唐成凯 在本刊中的所有文章 |
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参考文献: |
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[6] 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 Zhan, Liang Guolong. Frequency-Invariant Robust Adaptive Beamforming Based on Interference Covariance Matrix Reconstruction[J]. Acta Acustica, 2015, 40(1):104-109(in Chinese)
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