Broadband focusing for partially adaptive beamforming

M. Kaveh, S. Simanapalli

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A broadband adaptive beamforming approach based on the concept of signal-subspace alignment is formulated and contrasted with the conventional approach. The proposed method involves a preprocessor that focuses the signal spaces at different frequencies to a common one and a narrowband beamformer following the preprocessor. The merits that result as a consequence are partial adaptivity due to single frequency weights and decorrelation of coherent signals thus combating signal cancellation. The latter effect is studied by deriving expressions for the desired-signal distortion in a minimum variance distortionless response (MVDR) beamformer and analyzing them. Implementation issues of the preprocessor are addressed. Simulation results confirm the utility of the focusing preprocessor.

Original languageEnglish (US)
Pages (from-to)68-80
Number of pages13
JournalIEEE Transactions on Aerospace and Electronic Systems
Volume30
Issue number1
DOIs
StatePublished - Jan 1994

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