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Analytical Investigations on Carrier Phase Recovery in Dispersion-Unmanaged n-PSK Coherent Optical Communication Systems
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics. Acreo Swedish ICT AB, Sweden.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.
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2016 (English)In: PHOTONICS, ISSN 2304-6732, Vol. 3, no 4, article id 51Article in journal (Refereed) Published
Abstract [en]

Using coherent optical detection and digital signal processing, laser phase noise and equalization enhanced phase noise can be effectively mitigated using the feed-forward and feed-back carrier phase recovery approaches. In this paper, theoretical analyses of feed-back and feed-forward carrier phase recovery methods have been carried out in the long-haul high-speed n-level phase shift keying (n-PSK) optical fiber communication systems, involving a one-tap normalized least-mean-square (LMS) algorithm, a block-wise average algorithm, and a Viterbi-Viterbi algorithm. The analytical expressions for evaluating the estimated carrier phase and for predicting the bit-error-rate (BER) performance (such as the BER floors) have been presented and discussed in the n-PSK coherent optical transmission systems by considering both the laser phase noise and the equalization enhanced phase noise. The results indicate that the Viterbi-Viterbi carrier phase recovery algorithm outperforms the one-tap normalized LMS and the block-wise average algorithms for small phase noise variance (or effective phase noise variance), while the one-tap normalized LMS algorithm shows a better performance than the other two algorithms for large phase noise variance (or effective phase noise variance). In addition, the one-tap normalized LMS algorithm is more sensitive to the level of modulation formats.

Place, publisher, year, edition, pages
MDPI AG , 2016. Vol. 3, no 4, article id 51
Keywords [en]
coherent optical detection, optical fiber communication, carrier phase recovery, feed-back and feed-forward, laser phase noise, equalization enhanced phase noise, n-level phase shift keying
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-200766DOI: 10.3390/photonics3040051ISI: 000391179800001OAI: oai:DiVA.org:kth-200766DiVA, id: diva2:1072542
Note

QC 20170208

Available from: 2017-02-08 Created: 2017-02-02 Last updated: 2017-02-08Bibliographically approved

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