DocumentCode :
1457613
Title :
MLSE-Based DQPSK Transmission in 43 
Gb/s DWDM Long-Haul Dispersion-Managed Optical Systems
Author :
Bosco, Gabriella ; Cano, Ivan N. ; Poggiolini, Pierluigi ; Li, Liangchuan ; Chen, Ming
Author_Institution :
Dipt. di Elettron., Politec. di Torino, Torino, Italy
Volume :
28
Issue :
10
fYear :
2010
fDate :
5/15/2010 12:00:00 AM
Firstpage :
1573
Lastpage :
1581
Abstract :
We analyze by simulation the performance of the differential quadrature phase-shift keying (DQPSK) modulation format in dispersion-managed multi-span WDM optical systems at 43 Gb/s, with 50 GHz channel spacing, in the presence of fiber nonlinearity. We show that the use of maximum-likelihood sequence-estimation (MLSE) receivers significantly helps to increase tolerance to dispersion map design. We also show that the use of an MLSE algorithm which takes into account the correlation of samples allows to improve system performance, partially mitigating the impact of fiber non-linearity. Some of the results presented here hint at a possible use of similar techniques in the context of coherent systems as well.
Keywords :
maximum likelihood sequence estimation; optical fibre communication; quadrature phase shift keying; wavelength division multiplexing; DQPSK; DWDM long-haul dispersion-managed optical systems; MLSE; bit rate 43 Gbit/s; differential quadrature phase shift keying modulation; fiber nonlinearity; frequency 50 GHz; maximum likelihood sequence estimation; system performance; DQPSK; Dispersion compensation; MLSD; MLSE; dispersion maps; fiber nonlinearities; optical communications;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2010.2046475
Filename :
5439966
Link To Document :
