In this paper, we propose to increase residual carrier frequency offset tolerance based on short perfect reconstruction pulse shaping for coherent optical-orthogonal frequency division multiplexing. The proposed method suppresses the residual carrier frequency offset induced penalty at the receiver, without requiring any additional overhead and exhaustive signal processing. The Q-factor improvement contributed by the proposed method is 1.6 dB and 1.8 dB for time-frequency localization maximization and out-of-band energy minimization pulse shapes, respectively. Finally, the transmission span gain under the influence of residual carrier frequency offset is ̃62% with out-of-band energy minimization pulse shape.
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This paper was published in Optics express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-22-2-1749. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Funding: European Community's Seventh Framework Programme ; EPSRC [EP/J017582/1-UNLOC]; Aston Institute of Photonic Technologies
Kanesan, T., Le, S. T., Roque, D., & Ellis, A. D. (2014). Non-rectangular perfect reconstruction pulse shaping based ICI reduction in CO-OFDM. Optics Express, 22(2), 1749-1759. https://doi.org/10.1364/OE.22.001749