A Computationally Efficient Algorithm for DOA Estimation with Unfolded Coprime Linear Array

In this paper, we investigate the direction of arrival (DOA) estimation problem with unfolded coprime linear array (UCLA) and propose a low computational complexity signal-subspace fitting (SF) algorithm. SF algorithm is able to achieve excellent DOA estimation performance while it requires global a...

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Published inMathematical problems in engineering Vol. 2022; pp. 1 - 12
Main Authors Pan, Gong, Huafei, Yin
Format Journal Article
LanguageEnglish
Published New York Hindawi 05.09.2022
John Wiley & Sons, Inc
Subjects
Online AccessGet full text
ISSN1024-123X
1026-7077
1563-5147
1563-5147
DOI10.1155/2022/5429488

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Abstract In this paper, we investigate the direction of arrival (DOA) estimation problem with unfolded coprime linear array (UCLA) and propose a low computational complexity signal-subspace fitting (SF) algorithm. SF algorithm is able to achieve excellent DOA estimation performance while it requires global angular search (GAS). Especially in the several source signals situation, expensive complexity cost causes. To decrease computational complexity, we propose an initialized based SF (ISF) algorithm, which involves the several one dimensional (1D) partial angular search (PAS) instead of the multidimensional GAS. Consequently, the complexity is significantly decreased. Due to the full utilization of the array aperture, the proposed method in UCLA can attain better performance than general CLA (GCLA). In addition, as the SF is attractive in practical application, the proposed ISF algorithm lowers the computational cost, while achieving almost approximate estimation performance as traditional SF and noise subspace fitting (NF). Moreover, numerical simulations are provided and verify the effectiveness and the superiority of the proposed algorithm for the UCLA.
AbstractList In this paper, we investigate the direction of arrival (DOA) estimation problem with unfolded coprime linear array (UCLA) and propose a low computational complexity signal-subspace fitting (SF) algorithm. SF algorithm is able to achieve excellent DOA estimation performance while it requires global angular search (GAS). Especially in the several source signals situation, expensive complexity cost causes. To decrease computational complexity, we propose an initialized based SF (ISF) algorithm, which involves the several one dimensional (1D) partial angular search (PAS) instead of the multidimensional GAS. Consequently, the complexity is significantly decreased. Due to the full utilization of the array aperture, the proposed method in UCLA can attain better performance than general CLA (GCLA). In addition, as the SF is attractive in practical application, the proposed ISF algorithm lowers the computational cost, while achieving almost approximate estimation performance as traditional SF and noise subspace fitting (NF). Moreover, numerical simulations are provided and verify the effectiveness and the superiority of the proposed algorithm for the UCLA.
Author Pan, Gong
Huafei, Yin
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  surname: Huafei
  fullname: Huafei, Yin
  organization: Research Institute of China Aerospace Science and Industry CorporationNanjing 210007China
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Copyright Copyright © 2022 Gong Pan and Yin Huafei.
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SubjectTerms Algorithms
Complexity
Computational efficiency
Computing costs
Direction of arrival
Eigenvalues
Linear arrays
Mathematical problems
Sensors
Signal processing
Simulation
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Title A Computationally Efficient Algorithm for DOA Estimation with Unfolded Coprime Linear Array
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