Phase noise compensation for long-haul coherent optical communication systems using OFDM

Zhu, Jingwen (2015) Phase noise compensation for long-haul coherent optical communication systems using OFDM. Masters thesis, Memorial University of Newfoundland.

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Abstract

Long-haul optical transmission systems employing coherent optical orthogonal frequency division multiplexing (CO-OFDM) are sensitive to laser phase noise. This causes a common phase rotation and inter-carrier interference. An effective method to compensate for the phase noise is to insert an RF-pilot tone in the middle of the OFDM signal. This RF-pilot is used to reverse the phase distortion at the receiver. This thesis presents a detailed performance analysis of the RF-pilot phase noise compensation scheme in a simulated 64 Gbit/s CO-OFDM system. The effects of various parameters including laser linewidth, Mach-Zehnder modulator drive power, pilot-tosignal ratio, and fiber launch power are investigated. A comparison with the pilot-aided common phase error compensation method is provided to show the differences in the BER performance with respect to the required overhead.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/11635
Item ID: 11635
Additional Information: Includes bibliographical references (pages 81-88).
Keywords: optical communications, phase noise, OFDM
Department(s): Engineering and Applied Science, Faculty of
Date: October 2015
Date Type: Submission
Library of Congress Subject Heading: Orthogonal frequency division multiplexing; Radio -Transmitter-receivers--Simulation methods; Signal integrity (Electronics); Electromagnetic interference; Laser communication systems

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