DOA estimation of mixed coherent and uncorrelated targets exploiting coprime MIMO radar

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• 作者：Si Qin^aAuthor Vitae ; Yimin D. Zhang^b ; ^{ydzhang@temple.edu}Author Vitae ; Moeness G. Amin^aAuthor Vitae
• 关键词：Coprime array ; Sum coarray ; Direction-of-arrival estimation ; Coherent targets ; Bayesian compressive sensing
• 刊名：Digital Signal Processing
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：61
• 期：Complete
• 页码：26-34
• 全文大小：610 K
• 卷排序：61

文摘

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.