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Performance Comparison of Single-Sideband Direct Detection Nyquist-Subcarrier Modulation and OFDM

Erkilinc, MS; Pachnicke, S; Griesser, H; Thomsen, BC; Bayvel, P; Killey, RI; (2015) Performance Comparison of Single-Sideband Direct Detection Nyquist-Subcarrier Modulation and OFDM. JOURNAL OF LIGHTWAVE TECHNOLOGY , 33 (10) pp. 2038-2046. 10.1109/JLT.2015.2401396. Green open access

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Abstract

Direct detection transceivers offer advantages, including low cost and complexity, in short- and medium-haul links. We carried out studies seeking to identify the signal formats which offer the highest information spectral densities and maximum transmission distances for direct detection links. The performance of two spectrally efficient optical signal formats, single-sideband (SSB) Nyquist pulse-shaped subcarrier modulation (SCM) and SSB orthogonal frequency-division multiplexing (OFDM), are compared by means of simulations. The comparison is performed for a range of wavelength-division multiplexing (WDM) net information spectral densities up to 2.0 b/s/Hz by varying the signal bandwidth, modulation cardinality, and WDM channel spacing. The signal formats' tolerance to signal-signal beating interference, resulting from square-law detection, is investigated, and the Nyquist-SCM format is found to suffer lower penalties from this nonlinearity at high information spectral densities. In 7 × 28 Gb/s WDM transmission at 2.0 b/s/Hz (with electronic predistortion and EDFA-only amplification), Nyquist-SCM signals can be transmitted over distances of up to 720 km of standard SMF in comparison to a maximum of 320 km with the OFDM signal format.

Type: Article
Title: Performance Comparison of Single-Sideband Direct Detection Nyquist-Subcarrier Modulation and OFDM
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2015.2401396
Publisher version: http://dx.doi.org/10.1109/JLT.2015.2401396
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: Digital signal processing, direct detection, electronic pre-distortion, Nyquist pulse shaping, optical communication, orthogonal frequency division multiplexing, signal-signal beating interference, subcarrier modulation, wavelength division multiplexing
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/1472962
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