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Simplified DSP-Based Signal-Signal Beat Interference Mitigation Technique for Direct Detection OFDM

Li, Z; Erkilinc, MS; Bouziane, R; Thomsen, BC; Bayvel, P; Killey, RI; (2016) Simplified DSP-Based Signal-Signal Beat Interference Mitigation Technique for Direct Detection OFDM. Journal of Lightwave Technology , 34 (3) pp. 866-872. 10.1109/JLT.2015.2505187. Green open access

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Abstract

Short- and medium-haul links in interdata center, access, and metro networks require cost-effective direct-detection wavelength-division multiplexing transceivers offering energy efficiency, high information spectral density (ISD), and dispersion tolerance. Single-sideband orthogonal frequency-division multiplexing (SSB-OFDM) with direct detection is a potential solution; however, it suffers a penalty from signal-signal beat interference (SSBI) caused by the square-law photodetection. In this paper, a novel DSP-based SSBI mitigation technique, with lower complexity than previously proposed methods, is proposed and assessed through numerical simulations for the first time. The performance improvement is quantified by simulations of 9 × 112 Gb/s 16-QAM SSB-OFDM signal with a net optical ISD of 2.1 (b/s)/Hz. The performance is shown to be similar to that of the more complex receiver-based iterative SSBI compensation technique. Simulations predict an 8.7 dB reduction in the required OSNR at the 7% overhead HD-FEC threshold, and increases up to 100% in maximum reach over uncompensated standard single-mode fibre using the proposed simplified SSBI compensation technique.

Type: Article
Title: Simplified DSP-Based Signal-Signal Beat Interference Mitigation Technique for Direct Detection OFDM
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2015.2505187
Publisher version: https://doi.org/10.1109/JLT.2015.2505187
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Optical communication, spectrally efficient wavelength division multiplexing, signal-signal beat interference cancellation, direct detection, subcarrier modulation, orthogonal frequency division multiplexing, electronic pre-distortion
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/10056082
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