Two-Dimensional DOA Estimation of Coherent Sources for Acoustic Vector-Sensor Array Using a Single Snapshot

Authors:
Han Chen;Xiaofei Zhang
Affiliations:
College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016;College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016 and Nanjing Panda Electronics Group, Nanjing, China 210002 and Laborato ...
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

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Abstract

This paper discusses the problem of two-dimensional direction of arrival estimation of coherent sources for acoustic vector sensors array. Compared with subspace-based methods, such as root multiple signal classification and estimation of signal parameters via rotational invariance technique, the propagator method (PM) has lower computational complexity. However, only in high-snapshots situation, can the PM algorithm enjoy a better estimation performance. Besides, all of these algorithms mentioned above cannot work for coherent sources. In this paper, we combine PM algorithm with Toeplitz Hermitian matrix reconstruction, and propose an improved algorithm, which works well in the case of coherent signals and a single snapshot. Furthermore, the proposed method can achieve automatically paired two-dimensional angle estimation. Simulation results verify that the proposed method has the better angle performance and less computational complexity than spatial smoothing methods.