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Low Complexity Method for DOA Estimation Based on Nystrom Method

Assia Ouamri(1*), Abdelaziz Ouamri(2), Mokhtar Keche(3)

(1) Electrical Engineering Department, University of Science and Technlogie of Oran USTO-MB, Algeria
(2) Electrical Engineering Department, University of Science and Technlogy of Oran USTO-MB, Algeria
(3) Electrical Engineering Department, University of Science and Technlogy of Oran USTO-MB, Algeria
(*) Corresponding author


DOI: https://doi.org/10.15866/irecap.v7i3.10885

Abstract


The capacity to resolve closely spaced sources is one of the important issues of direction of arrival estimation algorithms. For this issue, we present a reduced subspace method based on invariance of noise subspace to the power of radiating sources. Unlike the conventional subspace methods, we use Eigen-values of reduced noise subspace to estimate direction of arrival of narrowband sources with a large array. Our approach is based on the Nystrom method. The main advantage of this method is its low computational complexity. Simulations show that the performances of the proposed method are superior to those of MUSIC when the sources are close and with power level differences between them.
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Keywords


Estimation; Eigenvalues; MUSIC; Covariance Matrices; Antenna

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References


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