Title :
Optimization of joint 32/64-QAM subcarrier modulation for 515-Gbit/s multi-band OFDM WDM transmission with 50-GHz channel spacing through 320-km SSMF transmission
Author :
Takahashi, Hiroki ; Wei-Ren Peng ; Kawaguchi, Yuki ; Tsuritani, Takehiro ; Morita, Itsuro
Author_Institution :
KDDI R&D Labs. Inc., Fujimino, Japan
Abstract :
Optimization of the joint 32/64-QAM subcarrier modulation is investigated using 3×515-Gbit/s multi-band OFDM transmission over 320-km SSMF with 50-GHz frequency grid. It is confirmed that the optimized joint 32/64-QAM with 20%-overhead FEC enables to increase OSNR sensitivity compared to 32-QAM with 7%-overhead FEC and 64-QAM with 20%-overhead FEC.
Keywords :
OFDM modulation; forward error correction; optical fibre communication; quadrature amplitude modulation; wavelength division multiplexing; 32-QAM; 64-QAM; SSMF transmission; channel spacing; distance 320 km; forward error correction; joint subcarrier modulation; multiband OFDM WDM transmission; overhead FEC; quadrature amplitude modulation; standard single mode fiber; wavelength division multiplexing; Joints; OFDM; Optical noise; Quadrature amplitude modulation; Signal to noise ratio; Wavelength division multiplexing;
Conference_Titel :
Optical Communications (ECOC), 2012 38th European Conference and Exhibition on
Conference_Location :
Amsterdam
