Show simple item record

dc.contributor.advisorJenn, David C.
dc.contributor.authorSiu, Marcos Chi Lim
dc.dateMar-16
dc.date.accessioned2016-04-29T21:19:00Z
dc.date.available2016-04-29T21:19:00Z
dc.date.issued2016-03
dc.identifier.urihttp://hdl.handle.net/10945/48475
dc.description.abstractDigital phased array antennas are sensitive to phase error among elements because it affects the coherence necessary to create the array factor. There are many sources for phase errors: local oscillators and clocks, quadrature modulators and demodulators, non-linear components, and so forth. Additionally, phased arrays are sensitive to element mislocation, which introduces another source of phase error. In this research, three types of phase errors were studied: phase noise, gain unbalance in quadrature modulators and demodulators, and element mislocation. Modifications to the traditional array pattern expression were proposed to account for these errors, and equations were programmed in MATLAB to perform parametric simulations to generate information regarding gain loss, beam pointing error, pattern distortions, and degradation in sidelobe levels. The objective is to aid array designers in setting acceptable tolerance limits for these types of errors.en_US
dc.description.urihttp://archive.org/details/effectsoflocalos1094548475
dc.publisherMonterey, California: Naval Postgraduate Schoolen_US
dc.rightsCopyright is reserved by the copyright owner.en_US
dc.titleEffects of local oscillator errors on digital beamformingen_US
dc.typeThesisen_US
dc.contributor.secondreaderRomero, Ric
dc.contributor.departmentElectrical and Computer Engineering
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.subject.authorradaren_US
dc.subject.authordistributed arrayen_US
dc.subject.authorphased arrayen_US
dc.subject.authorphase synchronizationen_US
dc.subject.authordigital arrayen_US
dc.subject.authordigital beamforming (dbf)en_US
dc.subject.authorwireless sensor networken_US
dc.subject.authortransmit/ receive (t/r) moduleen_US
dc.subject.authorlocal oscillatoren_US
dc.subject.authorphase noiseen_US
dc.description.serviceLieutenant, Brazilian Navyen_US
etd.thesisdegree.nameMaster of Science in Electrical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineElectrical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record