Increasing the spectral efficiency of DDO-CE-OFDM systems by multi-objective optimization

Helder Roberto O. de Rocha, Vinicius O.C. Dias, Esequiel da Veiga Pereira, Reginaldo Barbosa Nunes, Marcelo E.V. Segatto, Jair A.L. Silva (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A multi-objective optimization was implemented to increase the spectral efficiency of direct-detection optical orthogonal frequency division multiplexing (OFDM) systems with constant-envelope (CE) signals. Based on a genetic algorithm, the optimization procedure evaluates the impact of fiber injection power in the reduction of the guard band between the optical carrier and the CE-OFDM signals, optimizing important parameters such as electrical phase modulation and optical modulation indices of the denominated DDO-CE-OFDM system. Simulation results show that a guard-band reduction around 40% was achieved in a 4 Gbps optimized DDO-CE-OFDM system with 16-QAM subcarrier mapping and -7 dBm fiber input power. Results obtained in an experimental proof-of-concept conducted to validate the optimization procedure show that this reduction can reach 66\% according to a power penalty of 2 dB demanded by the inherent spectral broadening of CE-OFDM signals, after propagation over 40 km of standard single-mode fiber.

LanguageEnglish
Article number8640082
Pages2155-2162
Number of pages8
JournalJournal of Lightwave Technology
Volume37
Issue number9
DOIs
StatePublished - 1 May 2019

Fingerprint

frequency division multiplexing
envelopes
optimization
fibers
quadrature amplitude modulation
light modulation
penalties
phase modulation
genetic algorithms
injection
modulation
propagation
simulation

Keywords

  • Constant-envelope optical OFDM
  • multi-objective optimization
  • NSGA II
  • spectral efficiency

Cite this

de Rocha, H. R. O., Dias, V. O. C., da Veiga Pereira, E., Nunes, R. B., Segatto, M. E. V., & Silva, J. A. L. (2019). Increasing the spectral efficiency of DDO-CE-OFDM systems by multi-objective optimization. Journal of Lightwave Technology, 37(9), 2155-2162. [8640082]. DOI: 10.1109/JLT.2019.2898945
de Rocha, Helder Roberto O. ; Dias, Vinicius O.C. ; da Veiga Pereira, Esequiel ; Nunes, Reginaldo Barbosa ; Segatto, Marcelo E.V. ; Silva, Jair A.L./ Increasing the spectral efficiency of DDO-CE-OFDM systems by multi-objective optimization. In: Journal of Lightwave Technology. 2019 ; Vol. 37, No. 9. pp. 2155-2162
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abstract = "A multi-objective optimization was implemented to increase the spectral efficiency of direct-detection optical orthogonal frequency division multiplexing (OFDM) systems with constant-envelope (CE) signals. Based on a genetic algorithm, the optimization procedure evaluates the impact of fiber injection power in the reduction of the guard band between the optical carrier and the CE-OFDM signals, optimizing important parameters such as electrical phase modulation and optical modulation indices of the denominated DDO-CE-OFDM system. Simulation results show that a guard-band reduction around 40{\%} was achieved in a 4 Gbps optimized DDO-CE-OFDM system with 16-QAM subcarrier mapping and -7 dBm fiber input power. Results obtained in an experimental proof-of-concept conducted to validate the optimization procedure show that this reduction can reach 66\{\%} according to a power penalty of 2 dB demanded by the inherent spectral broadening of CE-OFDM signals, after propagation over 40 km of standard single-mode fiber.",
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de Rocha, HRO, Dias, VOC, da Veiga Pereira, E, Nunes, RB, Segatto, MEV & Silva, JAL 2019, 'Increasing the spectral efficiency of DDO-CE-OFDM systems by multi-objective optimization' Journal of Lightwave Technology, vol. 37, no. 9, 8640082, pp. 2155-2162. DOI: 10.1109/JLT.2019.2898945

Increasing the spectral efficiency of DDO-CE-OFDM systems by multi-objective optimization. / de Rocha, Helder Roberto O.; Dias, Vinicius O.C.; da Veiga Pereira, Esequiel; Nunes, Reginaldo Barbosa; Segatto, Marcelo E.V.; Silva, Jair A.L. (Corresponding author).

In: Journal of Lightwave Technology, Vol. 37, No. 9, 8640082, 01.05.2019, p. 2155-2162.

Research output: Contribution to journalArticleAcademicpeer-review

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de Rocha HRO, Dias VOC, da Veiga Pereira E, Nunes RB, Segatto MEV, Silva JAL. Increasing the spectral efficiency of DDO-CE-OFDM systems by multi-objective optimization. Journal of Lightwave Technology. 2019 May 1;37(9):2155-2162. 8640082. Available from, DOI: 10.1109/JLT.2019.2898945