Implementation of a flexible frequency-invariant broadband beamformer based on fourier properties
Weiss, Stephan and Hadley, Mark and Wilcox, Jon (2017) Implementation of a flexible frequency-invariant broadband beamformer based on fourier properties. In: IEEE Sensor Signal Processing in Defence Conference, 2017-12-06 - 2017-12-07, London. (In Press)
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Abstract
Aperture and operating frequency of a beamformer are generally proportional to its resolution, and inversely proportional to its beamwidth. This paper addresses the design and implementation of a beamformer with a frequency-dependent limitation of its aperture such that the frequency-dependence of its resolution is eliminated. Operating across a number of octaves, firstly an octave-invariance design is achieved by means of a nested array structure. Secondly, within each octave, a frequency-dependent aperture control then removes the remaining frequency-dependency. By exploiting Fourier properties and correspondences between coefficient and beamspace, we show that this design is exact, and can accommodate the inclusion of arbitrary shading and different look directions.
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Item type: Conference or Workshop Item(Paper) ID code: 61839 Dates: DateEvent6 September 2017Published6 September 2017AcceptedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering
Technology and Innovation Centre > Sensors and Asset ManagementDepositing user: Pure Administrator Date deposited: 21 Sep 2017 16:25 Last modified: 11 Apr 2024 03:05 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/61839