Sparse Signal Recovery for Direction-of-Arrival Estimation Based on Source Signal Subspace

After establishing the sparse representation of the source signal subspace, we propose a new method to estimate the direction of arrival (DOA) by solving an ℓ1-norm minimization for sparse signal recovery of the source powers. Second-order cone programming is applied to reformulate this optimization...

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Bibliographic Details
Published in:Journal of Applied Mathematics 2014-01, Vol.2014 (2014), p.1-8
Main Authors: Lin, Bo, Liu, Jiying, Xie, Meihua, Zhu, Jubo
Format: Article
Language:English
Subjects:
Alliances
Computational efficiency
Electronic warfare
Mathematical analysis
Mathematical models
Mathematical optimization
Measurement
Methods
Music
Noise
Optimization
Oscillation
Recovery
Robustness
Sensors
Signal processing
Sparsity
Subspaces
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Summary:After establishing the sparse representation of the source signal subspace, we propose a new method to estimate the direction of arrival (DOA) by solving an ℓ1-norm minimization for sparse signal recovery of the source powers. Second-order cone programming is applied to reformulate this optimization problem, and it is solved effectively by employing the interior point method. Due to the keeping of the signal subspace and the discarding of the noise subspace, the proposed method is more robust to noise than many other sparsity-based methods. The real data tests and the numerical simulations demonstrate that the proposed method has improved accuracy and robustness to noise, and it is not sensitive to the knowledge about the number of sources. We discuss the computational cost of our method theoretically, and the experiment results verify the computational effectiveness.
ISSN:1110-757X
1687-0042
DOI:10.1155/2014/530413