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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 2278–2288

Terabit bandwidth-adaptive transmission using low-complexity format-transparent digital signal processing

Qunbi Zhuge, Mohamed Morsy-Osman, Mathieu Chagnon, Xian Xu, Meng Qiu, and David V. Plant  »View Author Affiliations

Optics Express, Vol. 22, Issue 3, pp. 2278-2288 (2014)

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In this paper, we propose a low-complexity format-transparent digital signal processing (DSP) scheme for next generation flexible and energy-efficient transceiver. It employs QPSK symbols as the training and pilot symbols for the initialization and tracking stage of the receiver-side DSP, respectively, for various modulation formats. The performance is numerically and experimentally evaluated in a dual polarization (DP) 11 Gbaud 64QAM system. Employing the proposed DSP scheme, we conduct a system-level study of Tb/s bandwidth-adaptive superchannel transmissions with flexible modulation formats including QPSK, 8QAM and 16QAM. The spectrum bandwidth allocation is realized in the digital domain instead of turning on/off sub-channels, which improves the performance of higher order QAM. Various transmission distances ranging from 240 km to 6240 km are demonstrated with a colorless detection for hardware complexity reduction.

© 2014 Optical Society of America

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Optical Communications

Original Manuscript: October 9, 2013
Revised Manuscript: December 23, 2013
Manuscript Accepted: January 20, 2014
Published: January 28, 2014

Qunbi Zhuge, Mohamed Morsy-Osman, Mathieu Chagnon, Xian Xu, Meng Qiu, and David V. Plant, "Terabit bandwidth-adaptive transmission using low-complexity format-transparent digital signal processing," Opt. Express 22, 2278-2288 (2014)

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