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Adaptive Beamforming: Spatial Filter Designed Blocking Matrix
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1994 (English)In: IEEE journal of oceanic engineering : a journal devoted to the application of electrical and electronics engineering to the oceanic environment , ISSN 0364-9059 , Vol. 19, no 14, 583-590 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
New York: Institute of Electrical and Electronics Engineers, Council on Oceanic Engineering , 1994. Vol. 19, no 14, 583-590 p.
National Category
Signal Processing
URN: urn:nbn:se:bth-10000ISI: A1994PX32500011Local ID: diva2:838007
Published in IEEE Journal of Oceanic Engineering, October, 1994Available from: 2012-09-18 Created: 2000-03-15 Last updated: 2015-06-30Bibliographically approved

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Claesson, Ingvar
Signal Processing

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