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Sensors 2017, 17(4), 840; doi:10.3390/s17040840

Fast Noncircular 2D-DOA Estimation for Rectangular Planar Array

1
College of Science, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
2
Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA
3
Electronic and Information School of Yangtze University, Jingzhou 434023, China
*
Author to whom correspondence should be addressed.
Received: 20 February 2017 / Revised: 28 March 2017 / Accepted: 31 March 2017 / Published: 12 April 2017
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Abstract

A novel scheme is proposed for direction finding with uniform rectangular planar array. First, the characteristics of noncircular signals and Euler’s formula are exploited to construct a new real-valued rectangular array data. Then, the rotational invariance relations for real-valued signal space are depicted in a new way. Finally the real-valued propagator method is utilized to estimate the pairing two-dimensional direction of arrival (2D-DOA). The proposed algorithm provides better angle estimation performance and can discern more sources than the 2D propagator method. At the same time, it has very close angle estimation performance to the noncircular propagator method (NC-PM) with reduced computational complexity. View Full-Text
Keywords: two-dimensional direction of arrival (2D-DOA); real-valued propagator method; noncircular; rectangular planar array two-dimensional direction of arrival (2D-DOA); real-valued propagator method; noncircular; rectangular planar array
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Xu, L.; Wen, F. Fast Noncircular 2D-DOA Estimation for Rectangular Planar Array. Sensors 2017, 17, 840.

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