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• W2788989816 abstract "Sparse Bayesian learning (SBL) is applied to the coprime array for underdetermined wideband direction of arrival (DOA) estimation. Using the augmented covariance matrix, the coprime array can achieve a higher number of degrees of freedom (DOFs) to resolve more sources than the number of physical sensors. The sparse-based DOA estimation can deteriorate the detection and estimation performance because the sources may be off the search grid no matter how fine the grid is. This dictionary mismatch problem can be well resolved by the SBL using fixed point updates. The SBL can automatically choose sparsity and approximately resolve the non-convex optimizaton problem. Numerical simulations are conducted to validate the effectiveness of the underdetermined wideband DOA estimation via SBL based on coprime array. It is clear that SBL can obtain good performance in detection and estimation compared to least absolute shrinkage and selection operator (LASSO), simultaneous orthogonal matching pursuit least squares (SOMP-LS) , simultaneous orthogonal matching pursuit total least squares (SOMP-TLS) and off-grid sparse Bayesian inference (OGSBI)." @default.
• W2788989816 created "2018-03-06" @default.
• W2788989816 creator A5031363996 @default.
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• W2788989816 date "2018-01-16" @default.
• W2788989816 modified "2023-10-18" @default.
• W2788989816 title "Underdetermined Wideband DOA Estimation for Off-Grid Sources with Coprime Array Using Sparse Bayesian Learning" @default.
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• W2788989816 doi "https://doi.org/10.3390/s18010253" @default.
• W2788989816 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5795502" @default.
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• W2788989816 hasPublicationYear "2018" @default.
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