A CAPON-LIKE SPATIAL SPECTRUM ESTIMATOR FOR CORRELATED SOURCES (ThuAmOR2)

Author(s) : Richard Abrahamsson (Department of Information Technology, Uppsala University, Sweden) Andreas Jakobsson (Department of Electrical Engineering, Karlstad University, Sweden) Petre Stoica (Department of Information Technology, Uppsala University, Sweden)

Abstract : In this paper, we propose a data-adaptive method for estimating the spatial spectrum for correlated and/or coherent sources. The method is reminiscent of the MVDR/Capon beamformer, but yields a multidimensional spatial response with a dimension for each examined source. The estimated directions of arrival (DOA) are given as the points of energy concentration in the multidimensional spatial response. Numerical examples indicate a significant improvement over the standard MVDR/Capon beamformer.

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