文献类型：期刊文献

英文题名：Efficient 2-D DOA estimation for coherent sources with a sparse acoustic vector-sensor array

作者：Liu, Zhaoting[1];Ruan, Xieyong[1];He, Jin[2]

机构：[1]Shaoxing Univ, Dept Elect Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Nanjing Univ Sci & Technol, Dept Elect Engn, Nanjing 210094, Jiangsu, Peoples R China

年份：2013

卷号：24

期号：1

起止页码：105

外文期刊名：MULTIDIMENSIONAL SYSTEMS AND SIGNAL PROCESSING

收录：SCI-EXPANDED(收录号：WOS:000312715000007)、、EI(收录号：20130215875206)、Scopus(收录号：2-s2.0-84871746383)、WOS

语种：英文

外文关键词：Direction-of-arrival; Cross-correlation; Coherent signals; Spatially nonuniform noise; Linear operation

外文摘要：This paper proposes a computationally efficient two-dimensional (2-D) direction-of-arrival (DOA) estimation algorithm based extended-aperture for acoustic coherent signals impinging on a sparse acoustic vector-sensor array. The coherency of incident signals is decorrelated through matrix averaging and the signal/noise subspaces are reconstructed through a linear operation of a matrix formed from the cross-correlations between some sensor data, where the effect of additive noise is eliminated. Consequently, DOAs can be estimated without performing eigen-decomposition (into signal/noise subspaces), and there is no need to evaluate all correlations of the array data. The derived estimates are automatically matched by translating eigenvalues into real-valued ones, furthermore, the proposed method can achieve the unambiguous direction estimates with enhanced accuracy by setting the vector sensors to space much farther apart than a half-wavelength, and it is also suitable for the case of spatially nonuniform noise, which may be more realistic scenario for the sparsely placed sensors. The performance of the proposed method is demonstrated through numerical examples.