Title :
Training symbol based channel estimation for ultrafast polarization demultiplexing in coherent single-carrier transmission systems with M-QAM constellations
Author :
Morsy-Osman, Mohamed ; Chagnon, Mathieu ; Qunbi Zhuge ; Xian Xu ; Mousa-Pasandi, M. Esmaeel ; El-Sahn, Ziad A. ; Plant, David V.
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada
Abstract :
We propose a training symbol based algorithm that estimates the Jones channel matrix whose entries are used as the initial center taps of a decision-directed butterfly equalizer. With fewer than 40 training symbols, we experimentally demonstrate ultrafast polarization demultiplexing for 112 Gbps PDM-QPSK and 224 Gbps PDM-16QAM systems.
Keywords :
channel estimation; demultiplexing; equalisers; matrix algebra; optical fibre networks; optical fibre polarisation; quadrature amplitude modulation; quadrature phase shift keying; Jones channel matrix estimation; M-QAM constellations; PDM-16QAM systems; PDM-QPSK systems; bit rate 112 Gbit/s; bit rate 224 Gbit/s; coherent single-carrier transmission systems; decision-directed butterfly equalizer; training symbol-based channel estimation; ultrafast polarization demultiplexing; Bit error rate; Convergence; Demultiplexing; Equalizers; Steady-state; Switches; Training;
Conference_Titel :
Optical Communications (ECOC), 2012 38th European Conference and Exhibition on
Conference_Location :
Amsterdam
