提高二维DOA估计分辨率的改进MUSIC算法

doi:10.3969/j.issn.1001-2400.2012.02.023

Abstract

Abstract:

The resolution of the classical two-dimensional (2-D) Multiple Signal Classification(MUSIC) algorithm is limited by the certain array aperture under the contexts of low signal to noise ratio(SNR) and finite snapshots. Focusing on this problem, a modified 2-D direction of arrival (DOA) method based on the MUSIC algorithm is proposed. By calculating the second partial differentiation for the azimuth and elevation of the MUSIC spectrum, some negative peaks are shown around the original DOAs while MUISC spectrum does not make peaks there. The performance of the proposed method is evaluated for separating closely spaced sources in difficult contexts, for instance, a low SNR and a small number of snapshots in comparison with 2-D MUSIC method through computer simulations. Furthermore, the new approach is suitable to any array shape.

Key words: array signal processing, direction of arrival(DOA)estimation, multiple signal classification(MUSIC), resolution, second partial differentiation

CLC Number:

TN911

SI Weijian;LAN Xiaoyu;LIU Xue. Modified MUSIC algorithm for improving the resolution of 2-D direction of arrival estimation[J].J4, 2012, 39(2): 138-144.

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Modified MUSIC algorithm for improving the resolution of 2-D direction of arrival estimation

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