Fatadin, I and Ives, D and 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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