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dc.contributor.advisorPace, Phillip E.
dc.contributor.advisorDavis, D. Scott
dc.contributor.authorWickersham, David J.
dc.dateMarch, 2000
dc.date.accessioned2012-08-09T19:29:06Z
dc.date.available2012-08-09T19:29:06Z
dc.date.issued2000-03
dc.identifier.urihttp://hdl.handle.net/10945/9391
dc.identifier.urihttp://handle.dtic.mil/100.2/ADA378826
dc.description.abstractTo reduce the number of phase sampling comparators in a direction finding (DF) interferometer antenna, a new array based on a robust symmetrical number system (RSNS) is described. The RSNS is used to decompose the spatial filtering operation into a number of parallel sub-operations that are of smaller computational complexity. Each sub-operation (interferometer) symmetrically folds the phase with folding period equal to 2Nm(i) where N is the number of channels that are used and n(i) the channel modulus. A small comparator ladder mid-level quantizes each folded phase response. Each sub-operation only requires a precision in accordance with that modulus. A much higher DF resolution is achieved after the N different RSNS moduli are used and the results of these low precision sub-operations are recombined. The parallel use of phase waveforms increases the antenna resolution without increasing the folding rate of the system. The new antenna is constructed and tested in an anechoic chamber, and the results are compared with the experimental results of a previously tested optimum symmetrical number system (OSNS) array. Although the dynamic range of the RSNS is somewhat less than the OSNS, the inherent Gray code properties make it attractive for error control in phase sampling interferometry.en_US
dc.description.urihttp://archive.org/details/applicationofrob109459391
dc.format.extentxix, 154 p.;28 cm.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleApplication of the robust symmetrical number system to high resolution direction finding interferometryen_US
dc.typeThesisen_US
etd.thesisdegree.nameM.S. in Applied Physicsen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineApplied Physicsen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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