International Journal of Computer Network and Information Security (IJCNIS)
IJCNIS Vol. 5, No. 11, 8 Sep. 2013
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LPA 2D-DOA Estimation for Fast Nonstationary Sources Using New Array Geometry Configuration
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Author(s)
Amira Ashour
1,3,*
Yasser Albagory
2,3
Index Terms
Direction of Arrival estimation, 2D-DOA estimation, moving source localization, nonparametric techniques, local polynomial approximation, array geometry, computational load
Abstract
This paper proposes a new array geometry configuration to improve the two dimensional direction of arrival (2D-DOA) estimation of narrowband moving sources with less complexity. This new array is denoted by verticircular configuration, which is composed of both Uniform linear array (ULA) and Uniform Circular array (UCA) to avoid too much computation for 2D-DOA estimation. The proposed verticircular array is applied with the LPA nonparametric estimator to estimate multiple rapidly moving sources’ parameters (angles and angular velocities) for both azimuth as well as elevation directions. Simulation results show that this nonparametric technique is capable of resolving closely spaced sources provided that their velocities are sufficiently different with decreased computational complexity when using the verticircular array. Different scenarios are used to show the efficient LPA beamformer to distinguish sources that can have the same angles using their different angular velocities. In addition, this paper is to compare the performance of the 2D- LPA DOA estimation algorithm when using verticircular array (proposed array geometry) or rectangular planar array geometry. Simulation results show that the performance of the proposed method with less complexity than that obtained when using rectangular planar array.
Cite This Paper
AmiraAshour, Yasser Albagory, "LPA 2D-DOA Estimation for Fast Nonstationary Sources Using New Array Geometry Configuration", International Journal of Computer Network and Information Security(IJCNIS), vol.5, no.11, pp.1-8, 2013. DOI:10.5815/ijcnis.2013.11.01
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