Adaptive Beamforming - Spatial Filter Designed Blocking Matrix

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Full text:
Author(s): Sven Nordebo, Ingvar Claesson, Sven Nordholm
Title: Adaptive Beamforming - Spatial Filter Designed Blocking Matrix
Journal: IEEE journal of oceanic engineering : a journal devoted to the application of electrical and electronics engineering to the oceanic environment
Year: 1994
Volume: 19
Issue: 14
Pagination: 583-590
ISSN: 0364-9059
Publisher: Institute of Electrical and Electronics Engineers, Council on Oceanic Engineering
City: New York
ISI number: A1994PX32500011
Organization: Blekinge Institute of Technology
Department: Dept. of Signal Processing (Institutionen för signalbehandling)
Dept. of Signal Processing S-372 25 Ronneby
+46 455 780 00
http://www.hk-r.se/isb/isb_en.html
Authors e-mail: Sven.Nordebo@isb.hk-r.se
Language: English
Abstract: Controlling the resolution in adaptive beamformers is often crucial. A simple method that works for both narrowband and broad-band arrays is presented. This method is based on the normalized leaky LMS algorithm in conjunction with a generalized sidelobe canceller (GSC) structure, where the GSC is designed using a spatial filtering approach. In essence, the suppression of the spatial filters and the implicit noise of the leaky LMS algorithm together determine the adaptive beamformer. Analytical expressions are given for the Wiener filters and the output spectrum versus frequency and point source location. These expressions are employed in the design specification of the spatial filters and to obtain conditions for a controlled quiescent beamformer response. Simulation results are presented to illustrate the behavior of the array.
Subject: Signal Processing\Beamforming
Signal Processing\Filter Design
Note: Published in IEEE Journal of Oceanic Engineering, October, 1994
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