A noise-gated PLL for clock recovery in a free-space laser communication system
Noise-gated phase-locked loop for clock recovery in a free-space laser communication system
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
James K. Roberge and Robert J. Murphy.
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In this thesis, I developed a phase-locked loop system for data clock recovery in a free-space laser communication application. The clock recovery unit is designed to operate at extremely low optical received power, tolerate a fading channel, and also account for Doppler effects. I explored the feasibility of adding a noise-gating system to the clock recovery unit in order to improve link margin in low-data-rate scenarios. I measured key system performance metrics, such as bandwidth, rejection, lock range and phase noise, and tested system integration with the existing optical communications testbed.
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.Cataloged from PDF version of thesis.Includes bibliographical references (p. 67).
DepartmentMassachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology
Electrical Engineering and Computer Science.