The effect of coherant signals on the capability of array processing algorithms to resolve source bearings

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dc.contributor.advisorJohnson, Don H.en_US
dc.contributor.committeeMemberParks, Thomas W.en_US
dc.contributor.committeeMemberWilson, William L.en_US
dc.creatorDe Graaf, Stuart Randallen_US
dc.date.accessioned2018-12-18T21:22:45Zen_US
dc.date.available2018-12-18T21:22:45Zen_US
dc.date.issued1982en_US
dc.description.abstractIn the ocean environment, where multipath propagation of sound is common, the acoustic signals incident on a passive sonar array are often coherent. Cox has demonstrated that the capability of minimum energy adaptive beamforming to resolve the source bearings of incoherent signals is superior to that of classical beamforming. Seligson observed that when the signal wavefronts deviate from their assumed shape, the adaptive beamformer can be inferior to the classical beamformer in this regard. We study the effect of coherent signals on the capability of classical, adaptive, and linear predictive array processing algorithms to resolve source bearings. For a linear array of equally spaced sensors, we demonstrate the superior resolution capability of the linear predictive algorithm, and the significant effect of signal coherence on all three processing algorithms. We demonstrate the value of utilizing prediction elements in the center of the array to resolve closely-spaced signal bearings. Finally, we investigate the sensitivity of the processing algorithms to imperfections introduced into the correlation matrix by finite averaging, and establish the trade-off that exists between this sensitivity and the capability to resolve closely-spaced signal bearings.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent167 ppen_US
dc.identifier.callnoTHESIS E.E. 1982 DE GRAAFen_US
dc.identifier.citationDe Graaf, Stuart Randall. "The effect of coherant signals on the capability of array processing algorithms to resolve source bearings." (1982) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104418">https://hdl.handle.net/1911/104418</a>.en_US
dc.identifier.digitalRICE2053en_US
dc.identifier.urihttps://hdl.handle.net/1911/104418en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleThe effect of coherant signals on the capability of array processing algorithms to resolve source bearingsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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