Title :
The impact of the combined 8-QAM and QPSK subcarrier modulation for coherent optical OFDM
Author :
Takahashi, Hidenori ; Morita, Itsuro ; Tanaka, Hideaki
Author_Institution :
KDDI R&D Labs. Inc., Kamifukuoka, Japan
Abstract :
We investigated the optimized signal condition of the combined 8-QAM and QPSK subcarrier modulation for optical OFDM. The performance improvement was confirmed by WDM transmission experiments with the optimized power difference and subcarrier number.
Keywords :
OFDM modulation; optical modulation; quadrature amplitude modulation; quadrature phase shift keying; wavelength division multiplexing; QPSK subcarrier modulation; WDM transmission; coherent optical OFDM; combined 8-QAM; OFDM; Optical fibers; Optical noise; Phase shift keying; Signal to noise ratio; Wavelength division multiplexing;
Conference_Titel :
Optical Fiber Communication Conference and Exposition (OFC/NFOEC), 2011 and the National Fiber Optic Engineers Conference
Conference_Location :
Los Angeles, CA
Print_ISBN :
978-1-4577-0213-6
