Subband-selective partially adaptive broadband beamforming with cosine-modulated blocking matrix

Wei Liu, S. Weiss, L. Hanzo

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

2 Citations (Scopus)

Abstract

In this paper, a novel subband-selective generalized sidelobe canceller (GSC) with cosine-modulation 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 direction of arrivals and frequencies. This results in high pass-type bandlimited spectra of the blocking matrix outputs, which is further exploited by subband decomposition and discarding the low-pass subbands appropriately prior to running independent unconstrained adaptive filters in each non-redundant subband. By these steps, the computational complexity of our 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.
Original languageEnglish
Title of host publicationProceedings of the 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
PublisherIEEE
Pages2913-2916
Number of pages4
ISBN (Print)0-7803-7402-9
DOIs
Publication statusPublished - 2002
Event2002 IEEE International Conference on Acoustics, Speech, and Signal Processing - Renaissance Orlando Resort, Orlando, United States
Duration: 13 May 200217 May 2002

Conference

Conference2002 IEEE International Conference on Acoustics, Speech, and Signal Processing
Abbreviated titleICASSP 2002
CountryUnited States
CityOrlando
Period13/05/0217/05/02

Keywords

  • array signal processing
  • filtering
  • frequency modulation
  • sensors

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