摘要
欺骗式干扰、压制式干扰、卫星多径信号干扰是GPS最常见的,也是最有威胁的干扰。本文针对这三种干扰共存的情况,将子空间技术和低副瓣常规波束形成技术相结合,提出了一种通用的抗干扰算法。该算法能够同时抑制欺骗式干扰、压制式干扰和卫星多径信号干扰,并对GPS信号提供信号处理增益。本文还分析了欺骗式干扰和GPS卫星信号的相关特性,针对不同的相关性,提出分别采用协方差矩阵特征值分解和高分辨相干子空间估计方法来计算干扰子空间。仿真结果表明本文方法可以同时抑制多类干扰,保证接收机能够准确捕获到卫星信号。
Deception interference, blanket jamming and GPS multipath interference are the most common and treat interferences for GPS. When these interferences interfere GPS receiver simultaneously, a unified anti-jamming processor combined subspace technique with low sidelobe conventional beamforming techinique is proposed in this paper, which is capable of suppressing a mixture of interference types including deception interference, blanket jamming and GPS muhipath interference and providing signal processing gain for GPS signal. Also, the correlation property of GPS signal and deception interference is analyzed. When GPS signal and deception interference is partial correlation and uncorrelation, the interference subspace is calculated by eigenvalue decomposition of covariance matrix, and they are coherent each other, high resolution coherent subspace estimation technique is applied to calculate the interference subspace. Simulation results show that the algorithm proposed in this paper can suppress deception interference, blanket jamming and GPS multipath interference simultaneously, and ensure GPS receiver acquire satellite signal accurately.
出处
《信号处理》
CSCD
北大核心
2010年第5期682-686,共5页
Journal of Signal Processing
基金
国家863高技术计划(2006AA12Z321)
民航总局科技基金(MHRD0606)
中国民航大学科研启动基金(07QD03X)项目
关键词
全球定位系统
抗干扰
欺骗式干扰
多径
子空间
Global positioning system
Anti-jamming
Deception interference
Multipath
subspace
