Frequency invariant beamforming in subbands

Wei Liu, S. Weiss

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

5 Citations (Scopus)


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.
Original languageEnglish
Title of host publicationProceedings of the of the 38th Asilomar Conference on Signals, Systems and Computers, 2004
Number of pages5
ISBN (Print)0-7803-8622-1
Publication statusPublished - Nov 2004
EventThirty-Eighth Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States
Duration: 7 Nov 200410 Nov 2004


ConferenceThirty-Eighth Asilomar Conference on Signals, Systems and Computers
Country/TerritoryUnited States
CityPacific Grove, CA


  • array signal processing
  • computational complexity
  • frequency invariant beamforming

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