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为了寻找减小稀疏阵雷达杂波扩散的方法,有必要研究其杂波特性。在准确估计稀疏阵雷达杂波自相关阵的秩(简称杂波秩)的基础上得到了杂波秩的下界;通过研究杂波空时谱背脊线在空域和时域进行周期延拓的规律,得到了减小线性稀疏阵雷达杂波空时谱扩散和避免Doppler盲速的条件。这一条件与取得杂波秩下界的条件相同,有效减少了杂波扩散,可作为系统设计的依据。
In order to find a way to reduce the clutter dispersion of sparse array radar, it is necessary to study its clutter characteristics. The lower bound of the clutter rank is obtained based on the accurate estimation of the ranks of the sparse array radar clutter auto-correlation matrix. By studying the regularity of the cycle extension of the spur line in clutter space-time spectrum in airspace and time domain , The conditions for reducing the space-time spectrum spread of the linear sparse array radar clutter and avoiding the blind speed of Doppler are obtained. This condition is the same as that for obtaining the lower bound of the clutter, which effectively reduces the clutter dispersion and can be used as the basis for system design.