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Carrier Phase Recovery Algorithms for Coherent Optical Circular mQAM Systems
RISE - Research Institutes of Sweden, ICT, Acreo.
RISE - Research Institutes of Sweden, ICT, Acreo.
RISE - Research Institutes of Sweden, ICT, Acreo.
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2016 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 34, no 11, 2717-2723 p.Article in journal (Refereed) Published
Abstract [en]

The phase noise tolerance of circular multilevel quadrature amplitude modulation (C-mQAM) constellations employing different carrier phase recovery (CPR) algorithms is studied. A differential decoding scheme and a bit mapping for this type of constellations are proposed. A novel CPR scheme for C-mQAM constellations is also presented. The particular distribution of the constellation points in a C-mQAM signal is exploited to reduce the required Nth power for the removal of the modulation component by a factor of two. Hence, the computational complexity of the proposed algorithm is drastically reduced. The combined linewidth symbol duration product (??Ts) tolerance of different CPR algorithms for C-mQAM constellations is studied and compared with the proposed CPR scheme. The results are analyzed at 3.8e-3 and 1e-2 bit error rate forward error correction limits. The proposed CPR scheme achieves similar ??Ts tolerance compared to single stage BPS algorithm while its computational complexity is reduced by group factors of 27.2 | 32.3, and 30.5 | 32.6 (in the form of multipliers | adders) for C-16QAM and C-64QAM, respectively.

Place, publisher, year, edition, pages
2016. Vol. 34, no 11, 2717-2723 p.
Keyword [en]
communication complexity;decoding;error statistics;forward error correction;light coherence;optical communication;optical modulation;optical noise;phase noise;quadrature amplitude modulation;C-16QAM;C-64QAM;C-mQAM constellations;C-mQAM signal;bit error rate forward error correction limits;bit mapping;carrier phase recovery algorithms;circular multilevel quadrature amplitude modulation constellations;coherent optical circular mQAM systems;combined linewidth symbol duration product tolerance;computational complexity;differential decoding scheme;group factors;modulation component;phase noise tolerance;Bit error rate;Computational complexity;Decoding;Optical noise;Partitioning algorithms;Phase noise;Signal processing algorithms;Carrier phase recovery (CPR);Carrier phase recovery, ;Circular quadrature amplitude modulation (C-mQAM);Coherent detection;Differential decoding;Phase noise;circular quadrature amplitude modulation (C-mQAM);coherent detection;differential decoding;phase noise
National Category
Communication Systems Signal Processing Telecommunications
Identifiers
URN: urn:nbn:se:ri:diva-29871DOI: 10.1109/JLT.2016.2545339OAI: oai:DiVA.org:ri-29871DiVA: diva2:1108498
Available from: 2017-06-12 Created: 2017-06-12 Last updated: 2017-06-15Bibliographically approved

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Citation style
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