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dc.contributor.authorRichards, Randall George
dc.date.accessioned2013-02-15T23:30:15Z
dc.date.available2013-02-15T23:30:15Z
dc.date.issued1990
dc.identifier.urihttp://hdl.handle.net/10945/28011
dc.description.abstractThis paper develops a beam pattern design procedure for general multidimensional irregular sonar arrays that incorporates the not well understood effects of array geometry into the design process. The procedure is implemented by generating a penalty function in a spectral covariance function form. Processing the penalty function causes beam pattern high sidelobes to be penalized and the main lobe to be emphasized. This is accomplished by forming the penalty function in terms of an isotropic noise field of specified strength modified with a finite sector of low coherent energy and stabilized with incoherent sensor noise. By inputting the penalty function into a minimum variance beamformer, the beam pattern and aperture weights are calculated based on the given array geometry. The beamformer used is Capon's Maximum Likelihood Method. The array used to test the procedure is located on sixty degree sector of a cylindrical surface. The procedure is implemented by two different methods, each with some desirable characteristics. One method suppresses sidelobes indirectly by the enhancement of the main lobe with anti-nulls. Both methods are evaluated in terms of a sensitivity factor which constrains the maximum white noise array gain. (Author)en_US
dc.description.urihttp://archive.org/details/beampatterndesig00rich
dc.format.extent84 leaves.: ill.28 cm.en_US
dc.language.isoen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.titleA beam pattern design procedure for multidimensional sonar arrays employing minimum variance beamformingen_US
dc.typeThesisen_US
dc.contributor.departmentOcean Engineering
dc.identifier.oclcocn313368688
etd.thesisdegree.nameDegree of Ocean Engineeren_US
etd.thesisdegree.levelProfessional Degreeen_US
etd.thesisdegree.disciplineOcean Engineeringen_US
etd.thesisdegree.grantorMassachusetts Institute of Technology and the Woods Hole Oceanographic Institutionen_US


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