Coarray Interpolation for DOA Estimation Using Coprime EMVS Array

In this letter, we develop a coarray interpolation method for direction-of-arrival (DOA) estimation using the coprime electromagnetic vector-sensor (EMVS) array. Firstly, we derive the coarray signal model of the coprime EMVS array, which can be viewed as a combination of multiple polarization components. Subsequently, we fill in zero elements in each polarization component and recover the corresponding low-rank covariance matrix by solving a nuclear norm minimization (NNM) problem. By exploiting the recovered covariance matrices, we eventually construct a larger covariance matrix to carry out DOA estimation. Numerical experiment results demonstrate the superiority of the proposed algorithm over conventional methods.

Automated summary

The proposed method achieves DOA estimation by filling in zero elements, recovering covariance matrices, and constructing a larger covariance matrix, with experimental results demonstrating its superiority over conventional methods.