Journal
SIGNAL PROCESSING
Volume 130, Issue -, Pages 299-304Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.sigpro.2016.07.022
Keywords
Off-Grid; Difference co-array; Group sparsity; DOA estimation; Compressive sensing
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A wideband off-grid model is proposed to represent dictionary mismatch under the compressive sensing framework exploiting difference co-arrays. A group sparsity based off-grid method is proposed for underdetermined wideband direction of arrival (DOA) estimation which provides improved performance over the existing group sparsity based method with a same search grid. A two-step approach is then proposed which achieves an even better performance with significantly reduced computational complexity. (C) 2016 Elsevier B.V. All rights reserved.
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