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Two-stage n-PSK partitioning carrier phase recovery scheme for circular mQAM coherent optical systems
RISE, Swedish ICT, Acreo.ORCID iD: 0000-0001-5730-9656
KTH Royal Institute of Technology, Sweden.
RISE, Swedish ICT, Acreo.
KTH Royal Institute of Technology, Sweden.
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2016 (English)In: Photonics, ISSN 2304-6732, Vol. 3, no 2, article id 37Article in journal (Refereed) Published
Abstract [en]

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 (ΔnTs) tolerance is achieved compared to the single-stage n-PSK partitioning scheme. Superior performance in the ΔnTs 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.

Place, publisher, year, edition, pages
2016. Vol. 3, no 2, article id 37
Keywords [en]
Carrier phase recovery (CPR), Circular quadrature amplitude modulation (C-mQAM), Coherent detection, Phase noise
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-32583DOI: 10.3390/photonics3020037Scopus ID: 2-s2.0-85030866389OAI: oai:DiVA.org:ri-32583DiVA, id: diva2:1155340
Available from: 2017-11-07 Created: 2017-11-07 Last updated: 2020-01-22Bibliographically approved

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Navarro, Jaime RodrigoOzolins, Oskars

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