Title :
Performance limits of spectrally-efficient WDM direct-detection SSB Nyquist subcarrier modulation with signal-signal beat interference cancellation
Author :
Li, Z. ; Erkilinc, M.S. ; Pachnicke, S. ; Griesser, H. ; Bouziane, R. ; Thomsen, B.C. ; Bayvel, P. ; Killey, R.I.
Author_Institution :
Optical Networks Group, Department of Electronic and Electrical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
fDate :
June 30 2015-July 2 2015
Abstract :
We carried out a simulation-based study assessing the performance of WDM direct-detection dispersion pre-compensated single-sideband (SSB) Nyquist-pulse-shaped QAM subcarrier modulated (N-SCM) systems using a receiver-based signal-signal beat interference (SSBI) cancellation technique. The performance improvement with SSBI cancellation, which compensates for the nonlinear distortion caused by square-law detection, was quantified for 9 × 112 Gb/s 16-QAM and 9 × 224 Gb/s 64-QAM N-SCM signals with net optical information spectral densities (ISD) of 2.1 (b/s)/Hz and 4.1 (b/s)/Hz respectively. The simulations predict significant reductions in the required OSNR, and increases of up to 45% in transmission distance over uncompensated standard single-mode fibre (SSMF) using the SSBI compensation technique.
Keywords :
Amplitude modulation; Bit error rate; Optical fibers; Optical noise; Optical receivers; Wavelength division multiplexing; Nyquist pulse shaping; direct detection; electronic dispersion pre-compensation; signal-signal beat interference cancellation; spectrally-efficient WDM; subcarrier modulation;
Conference_Titel :
Networks and Optical Communications - (NOC), 2015 20th European Conference on
Conference_Location :
London, United Kingdom
DOI :
10.1109/NOC.2015.7238606
