Submarine transmissions with spectral efficiency higher than 3 b/s/Hz using Nyquist pulse-shaped channels
Oriol Bertran-Pardo, J. Renaudier, Patrice Tran, H. Mardoyan, P. Brindel, Amirhossein Ghazisaeidi, M. Salsi, Gabriel Charlet, S. Bigo · 2013
We study experimentally PDM QPSK, PDM 8QAM and PDM 16QAM signals with Nyquist pulse shaping at 28 Gbaud for undersea transmissions. We compare their noise sensitivity, nonlinear tolerance, transmission reach and assess their performance depending on channel spacing.