Nonlinear mitigation using carrier phase estimation and digital backward propagation in coherent QAM transmission

Lin, Chien Yu, Asif, Rameez, Holtmannspoetter, Michael and Schmauss, Bernhard (2012) Nonlinear mitigation using carrier phase estimation and digital backward propagation in coherent QAM transmission. Optics Express, 20 (26). B405-B412. ISSN 1094-4087

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Abstract

We investigate the performance of carrier phase estimation (CPE) and digital backward propagation (DBP) in compensating fiber nonlinearity for 224Gbps polarization-multiplexed quadrature-amplitudemodulation coherent systems with level of 4 and 16 (PM-4-QAM and PM-16-QAM) over standard single-mode fiber (SSMF) uncompensated link. The results from numerical simulation show the individual performance of CPE and DBP as well as their mutual influence. With DBP compensation, required CPE tap number for optimal performance can be reduced by 50% for 4-QAM signal and 67% for 16-QAM signal compared to linear compensation. On the other hand, employing CPE compensation after DBP also allows to reduce DBP steps. In the mentioned PM-16-QAM system, 60% reduction in the required number of DBP steps to achieve BER=10-3 is possible, with a step-size of 200km, which reveals great potential to reduce the complexity for future real time implementation.

Item Type: Article
Uncontrolled Keywords: atomic and molecular physics, and optics ,/dk/atira/pure/subjectarea/asjc/3100/3107
Faculty \ School: Faculty of Science > School of Computing Sciences
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 08 Sep 2022 08:31
Last Modified: 23 Sep 2022 02:48
URI: https://ueaeprints.uea.ac.uk/id/eprint/87908
DOI: 10.1364/OE.20.00B405

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