Accession Number:

ADA386636

Title:

Design and Experimental Evaluation of an Electro-Optical, Sigma-Delta Modulator for Wideband Digital Antennas

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

2000-12-01

Pagination or Media Count:

107.0

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.

Subject Categories:

  • Electrooptical and Optoelectronic Devices
  • Telemetry
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE