Title :
Self-Phase Modulation Compensation in Optical OFDM System Based on Wavelet
Author :
Gao, Lina ; Zeng, Xiangye ; Shi, Hua ; Liu, Jianfei
Author_Institution :
Sch. of Inf. Eng., Hebei Univ. of Technol., Tianjin, China
Abstract :
Self-Phase Modulation (SPM) can not be ignored in single light source OFDM system, so it is necessary to overcome the influence of SPM. A joint equalization solution to optical OFDM system based on orthogonal wavelet transform is proposed in this paper. In this method, block pilots are periodically inserted into the frame of OFDM signals. At receiver, the phase rotations of pilots are extracted to pre-compensation. Then, Maximum Likelihood Sequence Estimation (MLSE) equalizer based on Voterra is applied to compensation the SPM. Simulation results demonstrate that the proposed method is effective for 100 Gbit/s optical 16QAM-OFDM system in which the G.652 fiber with nonlinear coefficient of 2.6/w/km is used.
Keywords :
OFDM modulation; maximum likelihood sequence estimation; optical modulation; quadrature amplitude modulation; self-phase modulation; 16QAM-OFDM system; G.652 fiber; MLSE equalizer; SPM; Voterra; joint equalization solution; maximum likelihood sequence estimation equalizer; nonlinear coefficient; optical OFDM system; orthogonal wavelet transform; pilot phase rotations; self-phase modulation compensation; single light source OFDM system; Fiber nonlinear optics; Maximum likelihood estimation; OFDM; Optical fibers; Optical modulation;
Conference_Titel :
Photonics and Optoelectronics (SOPO), 2012 Symposium on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0909-8
DOI :
10.1109/SOPO.2012.6271087
