Xu, T;
Xu, T;
Bayvel, P;
Darwazeh, I;
(2019)
Non-Orthogonal Signal Transmission Over Nonlinear Optical Channels.
IEEE Photonics Journal
, 11
(3)
, Article 7203313. 10.1109/JPHOT.2019.2904960.
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Abstract
The performance of spectrally efficient frequency division multiplexing (SEFDM) in optical communication systems is investigated considering the impact of fiber nonlinearities. Relative to orthogonal frequency division multiplexing (OFDM), sub-carriers within SEFDM signals are packed closer at a frequency spacing less than the symbol rate. In order to recover the data, a specially designed sphere decoding detector is used at the receiver end to compensate for the self-created inter carrier interference encountered in SEFDM signals. Our research demonstrated the benefits of the use of sphere decoding in SEFDM and also demonstrates the performance improvement of long-haul optical communication systems using SEFDM compared to the use of conventional OFDM, when fiber nonlinearities are considered. Different modulation formats ranging from 4QAM to 32QAM are studied and it is shown that, for the same spectral efficiency and information rate, SEFDM signals allow a significant increase in the transmission distance compared to conventional OFDM signals.
| Type: | Article |
|---|---|
| Title: | Non-Orthogonal Signal Transmission Over Nonlinear Optical Channels |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JPHOT.2019.2904960 |
| Publisher version: | https://doi.org/10.1109/JPHOT.2019.2904960 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/. |
| Keywords: | OFDM, Bandwidth, Interference, Modulation, Optical fibers, Optical fiber networks, spectrally efficient frequency division multiplexing (SEFDM), orthogonal frequency division multiplexing (OFDM), optical fiber communication, nonlinear fiber channel |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10075523 |
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