Mitigation of nonlinear transmission effects for OFDM 16-QAM optical signal using adaptive modulation

Anton S. Skidin, Oleg S. Sidelnikov, Mikhail P. Fedoruk, Sergei K. Turitsyn

Research output: Contribution to journalArticlepeer-review


The impact of the fiber Kerr effect on error statistics in the nonlinear (high power) transmission of the OFDM 16-QAM signal over a 2000 km EDFA-based link is examined. We observed and quantified the difference in the error statistics for constellation points located at three power-defined rings. Theoretical analysis of a trade-off between redundancy and error rate reduction using probabilistic coding of three constellation power rings decreasing the symbol-error rate of OFDM 16-QAM signal is presented. Based on this analysis, we propose to mitigate the nonlinear impairments using the adaptive modulation technique applied to the OFDM 16-QAM signal. We demonstrate through numerical modelling the system performance improvement by the adaptive modulation for the large number of OFDM subcarriers (more than 100). We also show that a similar technique can be applied to single carrier transmission.

Original languageEnglish
Pages (from-to)30296-30308
Number of pages13
JournalOptics Express
Issue number26
Early online date22 Dec 2016
Publication statusPublished - 26 Dec 2016

Bibliographical note

© 2016 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.

Funding: EPSRC (UNLOC); and Ministry of Education and Science of Russian Federation (RFMEFI57814X0029 and 14.B25.31.0003).


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