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A subband-selective broadband GSC with cosine-modulated blocking matrix

Liu, Wei and Weiss, S. and Hanzo, L. (2004) A subband-selective broadband GSC with cosine-modulated blocking matrix. IEEE Transactions on Antennas and Propagation, 52 (3). pp. 813-820. ISSN 0018-926X

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    Abstract

    A novel subband-selective generalized sidelobe canceller (GSC) for partially adaptive broadband beamforming is proposed. The columns of the blocking matrix are derived from a prototype vector by cosine modulation, and the broadside constraint is incorporated by imposing zeros on the prototype vector appropriately. These columns constitute a series of bandpass filters, which select signals with specific directions of arrival and frequencies. This results in a high-pass-type bandlimited spectra of the blocking matrix outputs, which is further exploited by subband decomposition and suitably discarding the low-pass subbands prior to running independent unconstrained adaptive filters in each nonredundant subband. By these steps, the computational complexity of a GSC implementation is greatly reduced compared to fully adaptive GSC schemes, while performance is comparable or even enhanced due to subband decorrelation in both spatial and temporal domains.

    Item type: Article
    ID code: 3597
    Keywords: adaptive filters, array signal processing, band-pass filters frequency estimation, matrix algebra, Electrical engineering. Electronics Nuclear engineering, Mathematics, Electrical and Electronic Engineering, Condensed Matter Physics
    Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
    Science > Mathematics
    Department: Faculty of Engineering > Electronic and Electrical Engineering
    Related URLs:
      Depositing user: Strathprints Administrator
      Date Deposited: 08 Jun 2007
      Last modified: 04 Sep 2014 16:35
      URI: http://strathprints.strath.ac.uk/id/eprint/3597

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