Two-Stage n-PSK Partitioning Carrier Phase Recovery Scheme for Circular mQAM Coherent Optical Systems

Jaime Rodrigo Navarro, Aditya Kakkar, Xiaodan Pang, Miguel Iglesias Olmedo, Oskars Ozolins, Francesco Da Ros, Molly Piels, Richard Schatz, Darko Zibar, Gunnar Jacobsen, Sergei Popov

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Abstract

A novel two-stage n-PSK partitioning carrier phase recovery (CPR) scheme for circular multilevel quadrature amplitude modulation (C-mQAM) constellations is presented. The first stage of the algorithm provides an initial rough estimation of the received constellation, which is utilized in the second stage for CPR. The performance of the proposed algorithm is studied through extensive simulations at the forward error correction bit error rate targets of 3.8 × 10−3 and 1 × 10−2 and is compared with different CPR algorithms. A significant improvement in the combined linewidth symbol duration product (ΔνTs) tolerance is achieved compared to the single-stage n-PSK partitioning scheme. Superior performance in the ΔνTs tolerance compared to the blind phase search algorithm is also reported. The relative improvements with respect to other CPR schemes are also validated experimentally for a 28-Gbaud C-16QAM back-to-back transmission system. The computational complexity of the proposed CPR scheme is studied, and reduction factors of 24.5 | 30.1 and 59.1 | 63.3 are achieved for C-16QAM and C-64QAM, respectively, compared to single-stage BPS in the form of multipliers | adders.
Original languageEnglish
JournalPhotonics
Volume3
Issue number2
Number of pages11
ISSN2304-6732
DOIs
Publication statusPublished - 2016

Keywords

  • carrier phase recovery (CPR)
  • circular quadrature amplitude modulation (C-mQAM)
  • coherent detection
  • phase noise
  • Applied optics. Photonics
  • TA1501-1820

Cite this

Rodrigo Navarro, J., Kakkar, A., Pang, X., Iglesias Olmedo, M., Ozolins, O., Da Ros, F., Piels, M., Schatz, R., Zibar, D., Jacobsen, G., & Popov, S. (2016). Two-Stage n-PSK Partitioning Carrier Phase Recovery Scheme for Circular mQAM Coherent Optical Systems. Photonics, 3(2). https://doi.org/10.3390/photonics3020037