Journal
DIGITAL SIGNAL PROCESSING
Volume 61, Issue -, Pages 26-34Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.dsp.2016.06.006
Keywords
Coprime array; Sum coarray; Direction-of-arrival estimation; Coherent targets; Bayesian compressive sensing
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Funding
- Office of Naval Research (ONR) [N00014-13-1-0061]
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We propose a new scheme to estimate the directions-of-arrival (DOAs) of mixed coherent and uncorrelated targets exploiting a collocated multiple-input multiple-output (MIMO) radar with transmit/receive coprime arrays. In the proposed scheme, the DOAs of the uncorrelated targets are first estimated using subspace-based methods, whereas those of the coherent targets are resolved using Bayesian compressive sensing. Compared with the previous works, the proposed approach achieves improved DOA estimation accuracy with a flexible coprime array configuration and may resolve more targets than the number of coarray elements. Theoretical analysis and simulation results validate the effectiveness of the proposed technique. (C) 2016 Elsevier Inc. All rights reserved.
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