Direction-of-Arrival Estimation of Coherent Signals via Coprime Array Interpolation

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Original languageEnglish
Article number9044735
Pages (from-to)585-589
Journal / PublicationIEEE Signal Processing Letters
Online published23 Mar 2020
Publication statusPublished - 2020


In this letter, we devise an efficient approach for estimating the directions-of-arrival (DOAs) of coherent signals using coprime arrays. Specifically, we firstly derive an augmented uniform linear array (ULA) via coprime array interpolation. Subsequently, we define a Toeplitz matrix that is formed using the correlation information of the interpolated ULA theoretical outputs, and recover the Toeplitz matrix by solving a nuclear norm minimization problem. After the low-rank Toeplitz matrix is recovered, the coherent signals are well resolved by the MUSIC algorithm. Simulation results demonstrate the advantages of the proposed approach over various existing methods when dealing with coherent signals.

Research Area(s)

  • coherent signals, coprime array, Direction-of-arrival (DOA) estimation, interpolated ULA, Toeplitz matrix

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