Design and experimental evaluation of an electro-optical, sigma-delta modulator for wideband digital antennas
Loading...
Authors
Gillespie, William U.
Subjects
Advisors
Pace, Phillip E.
Powers, John P.
Date of Issue
2000-12
Date
2000
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Electro-optical sigma-delta analog-to-digital converters (ADCs) use a pulsed laser to oversample an input signal at two Mach-Zehnder interferometer modulators. A fiber lattice accumulator is embedded within a feedback loop around a single-bit quantizer to spectrally shape the quantization noise to fall outside the signal band of interest. Applications of electro-optical sigma-delta ADCs include digitizing wideband radio frequency signals directly at an antenna (digital antenna). The design considerations, construction process and experimental evaluation of the electro-optical sigma-delta ADC are presented. The experimental results are compared with a computer model of the electro- optical sigma-delta sampling and digitization process.
Type
Thesis
Description
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xii, 94 p.;28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This 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.