Estimation of direction-of-arrival and polarization with diversely polarized antennas in a circular symmetry incorporating mutual coupling effects

A modified Root-MUSIC algorithm is proposed to estimate the directions-of-arrival and the polarization parameters of plane waves using a diversely polarized uniform circular array. Special attention is devoted to the presence of the mutual coupling effects. A well chosen phase-mode expansion for the induced voltages over the antenna elements in combination with the symmetry of the array enables us to develop a computationally efficient estimation algorithm which incorporates all electromagnetic effects. Finally, the efficiency of the new algorithm is verified based on synthetic antenna data.