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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 10 — May. 9, 2011
  • pp: 9282–9295

Parallel implementation of all-digital timing recovery for high-speed and real-time optical coherent receivers

Xian Zhou and Xue Chen  »View Author Affiliations


Optics Express, Vol. 19, Issue 10, pp. 9282-9295 (2011)
http://dx.doi.org/10.1364/OE.19.009282


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Abstract

The digital coherent receivers combine coherent detection with digital signal processing (DSP) to compensate for transmission impairments, and therefore are a promising candidate for future high-speed optical transmission system. However, the maximum symbol rate supported by such real-time receivers is limited by the processing rate of hardware. In order to cope with this difficulty, the parallel processing algorithms is imperative. In this paper, we propose a novel parallel digital timing recovery loop (PDTRL) based on our previous work. Furthermore, for increasing the dynamic dispersion tolerance range of receivers, we embed a parallel adaptive equalizer in the PDTRL. This parallel joint scheme (PJS) can be used to complete synchronization, equalization and polarization de-multiplexing simultaneously. Finally, we demonstrate that PDTRL and PJS allow the hardware to process 112G bit/s POLMUX-DQPSK signal at the hundreds MHz range.

© 2011 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 1, 2011
Revised Manuscript: April 20, 2011
Manuscript Accepted: April 21, 2011
Published: April 27, 2011

Citation
Xian Zhou and Xue Chen, "Parallel implementation of all-digital timing recovery for high-speed and real-time optical coherent receivers," Opt. Express 19, 9282-9295 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-10-9282


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