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Application of multiplicative array techniques for multibeam sounder systems

DRS at CSIR-National Institute of Oceanography

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Title Application of multiplicative array techniques for multibeam sounder systems
 
Creator Chakraborty, B.
 
Description Multiplicative array processing is well known for its narrow beamwidth and low sidelobe level, but the array gain is quite low. The effectiveness of such a system becomes lower, especially when the signal to noise ratio is low. Proposed some modification in terms of additional computation or hardware for improved array gain. The present work is devoted towards the study of a better beamforming method i.e. a multiplicative array technique with some modification proposEd. by Brown and Rowland. Their method is used for a multibeam sounder system. The modified multiplicative array system consists of 20-elements. The performance of the proposed system is compared with an additive, i.e. delay-sum array of 40-elements of a similar configuration. The performance comparisons are made in terms of vaetical beam patterns at different main beam steering angles of 5 degrees, 10 degrees, 20 degrees, 30 degrees, and normal incidence directions. The operating frequency is assumed to be 15 kHz. In addition, the vertical beam pattern of the multiplicative array is also presented for the normal incidence direction
 
Date 2009-05-05T05:04:44Z
2009-05-05T05:04:44Z
1994
 
Type Journal Article
 
Identifier Acustica, Vol.80; 573-576p.
http://drs.nio.org/drs/handle/2264/2681
 
Language en
 
Rights Copyright [1994]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher European Acoustics Association