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按具体实现途径的不同,将宽带信号阵列测向中的子空间方法划分为非相干信号子空间方法、基于角度预估的宽带相干信号子空间方法、无需角度预估的宽带相干信号子空间方法、投影子空间正交性综合测试方法以及基于频率不变波束形成的宽带相干信号子空间方法等五大类,以各类方法的发展脉络为主线,结合已经提出的各种典型算法,对宽带信号阵列测向中的子空间方法进行了系统、全面的介绍,并对各种方法的优缺点进行了深入分析,提供了详实的参考文献,最后以此为基础,对该研究领域的下一步研究工作进行了展望。
According to the different ways of realizing, the subspace method in directional array for wideband signal array is divided into non-coherent signal subspace method, wideband coherent signal subspace method based on angle estimation, wideband coherent signal subspace method without angle estimation , Projection subspace orthogonality test method, and wideband coherent signal subspace method based on frequency invariant beamforming. Based on the development thread of various kinds of methods, combined with various typical algorithms that have been proposed, the broadband signal Array subsystems in array direction finding are systematically and comprehensively introduced. The advantages and disadvantages of each method are analyzed in depth, and detailed references are provided. Finally, based on this, the next step of research in this field The work was looked forward.