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In this paper, we present a simplified mutual coupling matrix (MCM) for Sparse Circular Arrays (SCA) that is used for underdetermined direction of arrival (DOA) estimation. The array type used in this paper is composed of dense and sparse parts that obtains very low mutual coupling (MC). This leads to a banded-like MCM. By incorporating the MCM in the DOA estimation problem, SCA is capable of DOA...
In this paper, the problem of direction-of-arrival (DOA) estimation for quasi-stationary signals is addressed using non-uniform circular arrays called nested circular array. We use the Khatri-Rao (KR) subspace approach to obtain an increase in the degrees of freedom. Thus, the nested circular array is capable of resolving more sources than the number of sensors. We therefore perform overdetermined...
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