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dc.contributor.advisorPace, Phillip E.
dc.contributor.authorEscobar, Kenny E.
dc.date.accessioned2012-03-14T17:40:00Z
dc.date.available2012-03-14T17:40:00Z
dc.date.issued2008-09
dc.identifier.urihttp://hdl.handle.net/10945/3986
dc.description.abstractThis thesis examines the role of photonics and integrated optics (IO) for use in analog-to-digital conversion in electronic warfare (EW) intercept receivers. The IO approach uses a continuous wave (CW) distributed feedback (DFB) laser diode at a peak wavelength of 1550 nm to oversample two Mach-Zehnder interferometers (MZIs). The MZIs are part of sigma-delta modulator-based analog-to-digital converter (ADC) oversampling architecture. A ring resonator accumulator is embedded within a feedback loop in the modulator to spectrally shape the quantization noise of the system. The experimental and simulation results are evaluated as a narrow-band proof of concept for the use of photonics technology in the sampling of wide-band radio frequency (RF) signals. Taking the characteristics of the real components and the experimental results, a pulse to pulse computer simulation of an oversampled first-order single-bit sigma-delta modulator was accomplished using RSoft OptSim. The performance characteristics of this subsystem were compared with the narrow-band results produced in the laboratory. In addition, a comparator processor circuit for the signal oversampling subsystem was designed and simulated in SIMUCAD SmartSpice. The analysis of the comparator processor circuit was evaluated. The lack of high-speed components limited the experimental and simulation results. With the system integrated with high-speed components, a wide-band direct digital antenna architecture can be demonstrated.en_US
dc.description.urihttp://archive.org/details/photonicfrontend109453986
dc.format.extentxvi, 67 p. : ill. (some col.) ;en_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.subject.lcshAnalog-to-digital convertersen_US
dc.subject.lcshModulators (Electronics)en_US
dc.subject.lcshDesignen_US
dc.subject.lcshIntegrated opticsen_US
dc.subject.lcshElectronics in military engineeringen_US
dc.subject.lcshRadio frequencyen_US
dc.titlePhotonic front-end and comparator processor for a sigma-delta modulatoren_US
dc.typeThesisen_US
dc.contributor.secondreaderFouts, Douglas J.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.description.serviceDepartment of Defense author (civilian).en_US
dc.identifier.oclc268820682
etd.thesisdegree.nameM.S.en_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineElectrical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.verifiednoen_US


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