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Frequency invariant beamforming in subbands

Liu, Wei and Weiss, S. (2004) Frequency invariant beamforming in subbands. [Proceedings Paper]

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Abstract

In this paper, two subband implementations of a frequency invariant beamformer (FIB) are studied. In the first structure, the received array signals are split into subbands and an FIB is operated in each of the corresponding decimated subbands, with a potential of achieving a lower computational complexity. As the spatio-temporal distribution of the subband signals is different from the original fullband signal, a modified design method of the FIB is proposed. Based on the subband implementation, we then change the sensor spacings of different subband signals so that lower frequency bands have a larger spacing, which results in a class of FIBs with scaled aperture with improved performance in lower frequencies. Several design examples are given to show the performance of our new structures.

Item type: Proceedings Paper
ID code: 39620
Keywords: array signal processing, computational complexity , frequency invariant beamforming , Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 09 May 2012 12:01
    Last modified: 17 Jul 2013 14:06
    URI: http://strathprints.strath.ac.uk/id/eprint/39620

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