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发明公开
CN104101868A 基于干扰子空间重构的雷达多假目标干扰抑制方法 失效 - 权利终止

基于干扰子空间重构的雷达多假目标干扰抑制方法
摘要：
本发明属于雷达多假目标干扰抑制技术领域，特别涉及基于干扰子空间重构的雷达多假目标干扰抑制方法。该基于干扰子空间重构的雷达多假目标干扰抑制方法包括以下步骤：根据雷达在第k个相干处理间隔内接收的回波信号rk，计算rk的协方差矩阵Rk；根据Rk最大的Q个特征值，得出第k个相干处理间隔的干扰子空间PJk，Q为雷达观测区域内干扰机的数量；利用PJk，对rk进行干扰信号抑制，得出雷达在第k个相干处理间隔的干扰抑制后信号Xk；估计第j部干扰机多普勒频率在第k+1个相干处理间隔和第k个相干处理间隔的变化量Δf0j,k；利用PJk和Δf0j,k，重构出第k+1个相干处理间隔的干扰子空间PJk+1；利用PJk+1，对雷达在第k+1个相干处理间隔内接收的回波信号rk+1进行干扰信号抑制，得出雷达在第k+1个相干处理间隔的干扰抑制后信号Xk+1。
摘要（英）：

The invention belongs to the radar multi-false target jamming suppression technique field and relates to a jamming subspace reconstruction-based radar multi-false target jamming suppression method. The jamming subspace reconstruction-based radar multi-false target jamming suppression method comprises the following steps that: a covariance matrix R of echo signals r is calculated according to the echo signals r which are received by a radar in a k-th coherent processing interval; a jamming subspace P of the k-th coherent processing interval is obtained according to Q largest eigenvalues of the R, wherein Q is the number of jammers in a radar observation region; jamming signal suppression is performed on the rk through using the P, so that post-jamming suppression signals X of the radar in the k-th coherent processing interval can be obtained; the variable quantity Delta f0j, k> of the Doppler frequency of a j-th jammer in a k+1-th coherent processing interval and the k-th coherent processing interval is estimated; a jamming subspace P of the k+1-th coherent processing interval can be reconstructed through utilizing the P and the Delta f0j, k; and jamming signal suppression is performed on echo signals r of the radar in the k+1-th coherent processing interval, so that post-jamming suppression signals X of the radar in the k+1-th coherent processing interval can be obtained.

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