The broad-band Wiener solution for Griffiths-Jim beamformers

Author

Nordholm, S. ; Claesson, I. ; Eriksson, P.

Author_Institution

Div. of Telecommun. Theory, Lund Univ., Sweden

Volume

40

Issue

2

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

474

Lastpage

478

Abstract

The authors treat the problem of finding the Wiener filters for a wideband adaptive beamformer. Explicit expressions are given for the filters and error power spectrum in the frequency domain. The expressions are simple to program and give the possibility of investigating superresolution for wideband signals and of determining sufficient lengths of the finite-impulse-response filters in adaptive arrays. The major results are an analytical expression for the broadband array Wiener solution given for an arbitrary spectrum for target, interference, and noise and an approximate analytic expression for the angular 3-dB beamwidth for broadband signals

Keywords

adaptive filters; digital filters; filtering and prediction theory; frequency-domain analysis; signal processing; FIR filters; Griffiths-Jim beamformers; Wiener filters; adaptive arrays; angular 3-dB beamwidth; array processing; broadband array; error power spectrum; finite-impulse-response filters; frequency domain; superresolution; wideband adaptive beamformer; wideband signals; Acoustic beams; Adaptive arrays; Array signal processing; Finite impulse response filter; Least squares approximation; Narrowband; Signal resolution; Spatial resolution; Wideband; Wiener filter;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.124966

Filename

124966