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Summary: RANGE AND BEARING ESTIMATION OF WIDEBAND SOURCES USING AN
ORTHOGONAL BEAMSPACE PROCESSING STRUCTURE
Darren B. Ward
Dept. of Electrical and Electronic Engineering
Imperial College London
London SW7 2BT, United Kingdom
Thushara D. Abhayapala
Dept. of Telecommunications Engineering, RSISE
The Australian National University
Canberra ACT 0200, Australia
ABSTRACT
We propose a new method for range and bearing estima-
tion of wideband sources based on a novel beamspace struc-
ture. The proposed structure consists of an orthogonal set
of beamspace processors that have a frequency-invariant
beampattern property, and can be steered easily to any
nearfield range while maintaining the frequency-invariance
of the spatial response. These properties mean that the pro-
posed structure can perform coherent signal subspace pro-
cessing for nearfield wideband sources, making it ideal for
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