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This paper presents an optimum linear array geometry for 2q-th order cumulant-based array processing for high-resolution direction of arrival (DOA) estimation. The concept of Khatri-Rao (KR) product gives the difference co-array which makes larger virtual array aperture. The virtual array geometry depends on the original physical array configuration, and the minimum redundancy array (MRA) can be regarded...
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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