2-D direction of arrival estimation combining UCA-RARE and MUSIC for uniform circular arrays subject to mutual coupling
Roald Goossens, Hendrik Rogier · Ghent University Academic Bibliography (Ghent University) · 2005
A new algorithm for 2-D direction-of-arrival estimation of azimuth and elevation angle is presented for uniform circular arrays by combining UCA-RARE and MUSIC in the presence of the mutual coupling.To describe mutual coupling in a uniform circular array we make use of the symmetry of the array and expand the open-circuit voltages into a limited number of spherical modes.The UCA-RARE technique is then applied to estimate the azimuth angle independent from the elevation angle.Next for each azimuth angle we estimate the corresponding elevation angles.Some illustrative examples are given to validate our approach.