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阵列高分辨方向估计技术是近十年来十分活跃的研究课题,其中存在相干信号源时如何实现有效的高分辨问题是研究的重点之一。虽已提出了若干解决方法,但这一问题尚未得到满意地解决。本文从信号子空间的估计出发对上述问题作了进一步的研究,提出了在有相干信号源的环境下估计信号子空间的一般途径,我们称之为广义信号子空间估计方法。这一思想为研究更为有效的解决相干信号高分辨的方法提供了一条新的可能途径。文中给出了基于这种思想得到的几种算法及其部分模拟实验结果。
Array high-resolution direction estimation technology is a very active research topic in the last ten years. One of the focuses of the study is how to achieve effective high-resolution problem in the presence of coherent signal sources. Although a number of solutions have been proposed, this issue has not yet been satisfactorily resolved. In this paper, the above problems are further studied from the estimation of signal subspace, and the general approach of estimating signal subspace in the presence of coherent signal source is proposed. We call it a generalized signal subspace estimation method. This idea provides a new possible way to study the more effective method of resolving the high resolution of coherent signals. In this paper, several algorithms based on this idea and some simulation results are given.