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Compensation of Frequency Offset for Differentially Encoded 16-and 64-QAM in the Presence of Laser Phase Noise

Fatadin, I; Ives, D; Savory, SJ; (2010) Compensation of Frequency Offset for Differentially Encoded 16-and 64-QAM in the Presence of Laser Phase Noise. IEEE PHOTONIC TECH L , 22 (3) 176 - 178. 10.1109/LPT.2009.2037329.

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Abstract

The compensation of frequency offset for differentially encoded 16- and 64-ary quadrature amplitude modulation (QAM) in the presence of laser phase noise is investigated. Differential encoding is employed to solve the four-fold phase ambiguity problem in a nondata-aided transmission system with square QAM constellations. Simulation results show that frequency offset and phase noise can successfully be compensated using a second-order digital filter loop for the square QAM constellations.

Type:Article
Title:Compensation of Frequency Offset for Differentially Encoded 16-and 64-QAM in the Presence of Laser Phase Noise
DOI:10.1109/LPT.2009.2037329
Keywords:Differential encoding (DE), frequency offset, phase recovery, quadrature amplitude modulation (QAM), FEEDFORWARD CARRIER RECOVERY, COHERENT, TRANSMISSION, RECEIVER, SYSTEM
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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