Wideband Beamspace Processing Using Orthogonal Modal Beamformers

Authors:
Thushara Dheemantha Abhayapala;Darren B. Ward
Affiliations:
Applied Signal Processing Group, Research School of Information Sciences and Engineering, The Australian National University, Canberra, Australia 0200;, London, UK
Venue:
Journal of Signal Processing Systems
Year:
2011

Citing 5
Cited 0

Signals & systems (2nd ed.)

Signals & systems (2nd ed.)
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DOA estimation of wideband sources using a harmonic source modeland uniform linear array

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Abstract

We introduce a novel beamspace processing structure that can be used for narrowband or wideband sources located either in nearfield or farfield of a sensor array. Main features of the new structure are: (i) a single parameter is used to steer the processor to any desired radial distance; (ii) a set of fixed frequency invariant orthogonal beamformers are used to transform array data into beamspace; and (iii) consequently, only a single set of beamspace weights are needed to process wideband beamspace data. The utility of the novel structure is illustrated by applications in interference cancellation and direction/range estimation.