Title :
Chromatic Dispersion Compensation of OOK Signals With MLSE Utilizing Diverse VSB Filtering
Author :
Li, Ming ; Zhang, Fan ; Chen, Zhangyuan ; Xu, Anshi
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Peking Univ., Beijing
Abstract :
We present diverse vestigial-sideband-filtering maximum-likelihood sequence estimation (DVSB-MLSE), a modification of MLSE, for residual chromatic dispersion (CD) compensation in nonreturn-to-zero (NRZ) on-off keying (OOK) systems. While VSB filtering can considerably increase residual CD tolerance of MLSE receivers, the performance of MLSE can be further enhanced by diverse reception, through which the MLSE module jointly equalizes samples from upper and lower VSB filtered signals. Simulation results show that compared to conventional MLSE, DVSB-MLSE increases the residual CD tolerance at 3-dB optical signal-to-noise ratio penalty by 110% in a 42.7-Gb/s NRZ-OOK system.
Keywords :
amplitude shift keying; diversity reception; maximum likelihood sequence estimation; optical fibre communication; optical fibre dispersion; optical receivers; NRZ-OOK system; bit rate 42.7 Gbit/s; diverse reception; diverse vestigial-sideband-filtering; fiber communication system; maximum-likelihood sequence estimation; nonreturn-to-zero on-off keying system; optical signal-to-noise ratio penalty; residual chromatic dispersion compensation; Diverse reception; maximum-likelihood sequence estimation (MLSE); vestigial sideband (VSB);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.2004967
