摘要
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。
This paper deals with the problem of high-resolution angle of arrival estimation in the presence of coherent signal sources. The receiving antenna is restricted to uniform linear array of sensors.Special attentions are paid to the estimation of signal subspace by the array measurements. A general procedure is developed that, in the first place, estimate the vector (s)of the signal subspace in N(the number of the array elements)dimensonal vector space C, and secondly, estimate the orthogonal projection matrix of a signal subspace in a lower dimensional space C, where M<N. We have shown that the well known spatial smoothing technique can be considered as a special case of the new approach. Simulation results are presented to show the effectiveness of the new approach.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1990年第4期42-49,共8页
Acta Electronica Sinica
基金
国家自然科学基金
