Improved wavelet-based beamformers with dynamic subband selection

Yung Yi Wang*, Wen Hsien Fang, Jiunn Tsair Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Adaptive beamformers, which can automatically adjust the weights to form prescribed spatial selectivity, have found applications in various facets of signal processing applications ranging from radar and sonar to wireless communications. To facilitate real-time implementations, it is of importance to mitigate the computational load in the weight adaptive process, especially for arrays which consist of many sensors in order to achieve better interference rejection and resolution. For this purpose, various attempts have been made for the design of partially adaptive beamformers, which only employ a subset of weights in the adaptive process. Despite their effectiveness, these approaches often call for computationally intensive eigendecomposition or nonlinear optimization. We address a simple, yet effective partially adaptive beamformer with the generalized sidelobe canceler (GSC) as the underlying structure. The new beamformer employs a set of P-regular, M-band wavelet filters in the design of the blocking matrix involved. The beamformer is applicable to the broadband scenario. Furthermore, a new subband selection scheme is addressed, which only retains the principal subband components in the adaptive process.

Original languageEnglish
Title of host publicationIEEE Antennas and Propagation Society International Symposium
Subtitle of host publicationWireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1464-1467
Number of pages4
ISBN (Electronic)078035639X, 9780780356399
DOIs
StatePublished - 1999
Externally publishedYes
Event1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999 - Orlando, United States
Duration: 11 07 199916 07 1999

Publication series

NameIEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting
Volume2

Conference

Conference1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999
Country/TerritoryUnited States
CityOrlando
Period11/07/9916/07/99

Bibliographical note

Publisher Copyright:
© 1999 IEEE.

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