A method of direction finding operating on an heterogeneous array

In a multipaths context, direction finding must resort to hight resolution algorithms. Classically, they operate on arrays of isotropic or identical sensors because they use the geometrical phase that the space diversity induces on the received signals. We propose to derive the standard music algorithm as the array is made up with sensor which are different from each other, assuming that their spatial complex responses are well know. An original computation is then described and some consequence advantages are underlined; for example, a new approach of the array ambiguity is presented, as the geometrical phase is no more the single relevant parameter attached to a direction of arrival. At last, some experimental results are listed in the field of h.f. radio direction finding, aiming to achieve a single site localization.