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Adaptive beamforming as an inverse problem

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2 Author(s)
Barroso, V.A. ; CAPS, Inst. Superior Tecnico, Lisbon, Portugal ; Moura, J.M.F.

In previous work, the authors developed a minimum-mean-square-error beamformer (MMSE-BF). When they compared it to the minimum-variance distortionless-response beamformer (MVDR-BF), they concluded that it is especially suited for correlated returns. This improvement is at the cost of some frequency distortion in wideband applications. To circumvent this problem, the minimum-mean-square-error distortionless-response beamformer (MMSEDR-BF) is introduced. Its behavior is compared with the MVDR-BF and the MMSE-BF. Adaptive beamforming is discussed as an inverse problem. Within this framework, the authors suggest the use of alternative norms, e.g. the L 1 norm. Preliminary results for L1 adaptive beamforming are presented

Published in:

Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on

Date of Conference:

23-26 May 1989