EP 1919251 A1 20080507 - Beamforming weights conditioning for efficient implementations of broadband beamformers
Title (en)
Beamforming weights conditioning for efficient implementations of broadband beamformers
Title (de)
Anpassung der Gewichtsfaktoren für Strahlformung zur effizienten Implementierung von Breitband-Strahlformern
Title (fr)
Conditionner l'échantillonnage de la formation du faisceaux pour le realisation efficace de faisceaux à large bande
Publication
Application
Priority
EP 06022602 A 20061030
Abstract (en)
In a channel-based beamforming system in which beamforming weights are predetermined, an improvement of the beamforming design method comprising modifying each beamforming weight in the frequency domain by dividing each beamforming weight by a common characteristic established in the frequency response across an array of sensors prior to fitting each beamforming weight to a filter. Also provided is a weight-conditioning beamformer for providing spatial directivity. The weight conditioned beamformer comprises an array of sensors, corresponding beamforming filters fitted with conditioned beamforming weights, and a summer for summing the outputs of the filters. The conditioned beamforming weights are obtained by dividing each beamforming weight by a common characteristic established in the frequency response across an array of sensors prior to fitting each beamforming weight to the filter.
IPC 8 full level
H04R 3/00 (2006.01)
CPC (source: EP)
H04R 3/005 (2013.01); H04R 25/407 (2013.01); H04R 2430/03 (2013.01); H04R 2430/20 (2013.01)
Citation (search report)
- [A] EP 1517581 A2 20050323 - MITEL NETWORKS CORP [CA]
- [A] YUU-SENG LAU ET AL: "A weight-vector LMS algorithm for adaptive beamforming", TENCON 2004. 2004 IEEE REGION 10 CONFERENCE CHIANG MAI, THAILAND NOV. 21-24, 2004, PISCATAWAY, NJ, USA,IEEE, 21 November 2004 (2004-11-21), pages 495 - 498, XP010797663, ISBN: 0-7803-8560-8
- [A] LAL C GODARA ET AL: "Limitations and Capabilities of Frequency Domain Broadband Constrained Beamforming Schemes", IEEE TRANSACTIONS ON SIGNAL PROCESSING, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 47, no. 9, September 1999 (1999-09-01), XP011058688, ISSN: 1053-587X
Designated contracting state (EPC)
DE FR GB
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
EP 1919251 A1 20080507; EP 1919251 B1 20100901; DE 602006016617 D1 20101014
DOCDB simple family (application)
EP 06022602 A 20061030; DE 602006016617 T 20061030