The synthesis of robust broadband beamformers for equally-spaced linear arrays.
Identifieur interne : 000352 ( PubMed/Corpus ); précédent : 000351; suivant : 000353The synthesis of robust broadband beamformers for equally-spaced linear arrays.
Auteurs : Marco Crocco ; Andrea TruccoSource :
- The Journal of the Acoustical Society of America ; 2010.
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Abstract
Broadband beamforming applied to superdirective arrays is known to be highly sensitive to transducers characteristics errors. Recently, an effective method to synthesize a robust, broadband, data-independent, filter-and-sum beamformer, which considers the probability distributions of errors, has been proposed. It considers an array with arbitrary lay-out and provides a spatial directivity pattern close to the desired one. Unfortunately, the evaluation of the cost function requires a computational load and an amount of memory that increases very quickly with the transducers and the filter coefficients. As the synthesis process requires an iterative minimization, it may become unacceptably long. In this paper, an alternative procedure for evaluating the same cost function is presented, drastically reducing such problems and without introducing any approximation. The only additional constraint is on the antenna which must be an equally-spaced linear array. This procedure makes it much easier to apply the above-mentioned synthesis method to a wide panorama of practical situations.
DOI: 10.1121/1.3455852
PubMed: 20707439
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pubmed:20707439Le document en format XML
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Recently, an effective method to synthesize a robust, broadband, data-independent, filter-and-sum beamformer, which considers the probability distributions of errors, has been proposed. It considers an array with arbitrary lay-out and provides a spatial directivity pattern close to the desired one. Unfortunately, the evaluation of the cost function requires a computational load and an amount of memory that increases very quickly with the transducers and the filter coefficients. As the synthesis process requires an iterative minimization, it may become unacceptably long. In this paper, an alternative procedure for evaluating the same cost function is presented, drastically reducing such problems and without introducing any approximation. The only additional constraint is on the antenna which must be an equally-spaced linear array. This procedure makes it much easier to apply the above-mentioned synthesis method to a wide panorama of practical situations.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">20707439</PMID><DateCreated><Year>2010</Year><Month>08</Month><Day>16</Day></DateCreated><DateCompleted><Year>2011</Year><Month>01</Month><Day>27</Day></DateCompleted><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1520-8524</ISSN><JournalIssue CitedMedium="Internet"><Volume>128</Volume><Issue>2</Issue><PubDate><Year>2010</Year><Month>Aug</Month></PubDate></JournalIssue><Title>The Journal of the Acoustical Society of America</Title><ISOAbbreviation>J. Acoust. Soc. Am.</ISOAbbreviation></Journal><ArticleTitle>The synthesis of robust broadband beamformers for equally-spaced linear arrays.</ArticleTitle><Pagination><MedlinePgn>691-701</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1121/1.3455852</ELocationID><Abstract><AbstractText>Broadband beamforming applied to superdirective arrays is known to be highly sensitive to transducers characteristics errors. Recently, an effective method to synthesize a robust, broadband, data-independent, filter-and-sum beamformer, which considers the probability distributions of errors, has been proposed. It considers an array with arbitrary lay-out and provides a spatial directivity pattern close to the desired one. Unfortunately, the evaluation of the cost function requires a computational load and an amount of memory that increases very quickly with the transducers and the filter coefficients. As the synthesis process requires an iterative minimization, it may become unacceptably long. In this paper, an alternative procedure for evaluating the same cost function is presented, drastically reducing such problems and without introducing any approximation. The only additional constraint is on the antenna which must be an equally-spaced linear array. This procedure makes it much easier to apply the above-mentioned synthesis method to a wide panorama of practical situations.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Crocco</LastName><ForeName>Marco</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Department of Biophysical and Electronic Engineering DIBE, University of Genoa, Via Opera Pia 11, Genova 16145, Italy.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Trucco</LastName><ForeName>Andrea</ForeName><Initials>A</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>J Acoust Soc Am</MedlineTA><NlmUniqueID>7503051</NlmUniqueID><ISSNLinking>0001-4966</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="N" UI="D000162">Acoustics</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000295">instrumentation</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D017076">Computer-Aided Design</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D004867">Equipment Design</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="Y" UI="D016014">Linear Models</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="Y" UI="D017711">Nonlinear Dynamics</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="Y" UI="D009716">Numerical Analysis, Computer-Assisted</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="Y" UI="D012815">Signal Processing, Computer-Assisted</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="Y" UI="D014159">Transducers</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2010</Year><Month>8</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2010</Year><Month>8</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>1</Month><Day>29</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1121/1.3455852</ArticleId><ArticleId IdType="pubmed">20707439</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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