Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Off-broadside main beam design and subband implementation for a class of frequency invariant beamformers

Liu, W. and Weiss, S. (2009) Off-broadside main beam design and subband implementation for a class of frequency invariant beamformers. Signal Processing, 89 (5). pp. 913-920. ISSN 0165-1684

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The design of frequency invariant beamformers (FIBs) with off-broadside main beams is studied and it is shown that the required FIR filter length in this case should be much larger than the one with a broadside main beam. To reduce the computational complexity of such a beamformer and also improve its frequency invariant property at lower frequencies, two subband implementations are proposed. in the first one, the fullband array signals are split into subbands by a bank of analysis filters and the corresponding decimated subband signals form a series of subband arrays, Based on this standard subband structure, we then change the sensor spacings of different subband signals so that lower frequency bands have a larger spacing. which leads to a class of FIBs with scaled aperture with further improved performance at lower frequencies.

Item type: Article
ID code: 14652
Keywords: frequency invariant beamforming, broadband arrays, filter banks, subband beamforming, scaled aperture, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 28 Jun 2010 11:38
    Last modified: 06 Dec 2013 21:06
    URI: http://strathprints.strath.ac.uk/id/eprint/14652

    Actions (login required)

    View Item