Title :
Mitigation of XPM-induced interference in QPSK/OFDM hybrid system
Author :
Hongru Zhou ; Jian Chen ; Yong Zhang ; Yulong Wang
Author_Institution :
Sch. of InfoComm Eng., Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
The performance of high data rate QPSK channels is impaired by cross-phase modulation (XPM) induced by lower rate optical orthogonal frequency division multiplexing (OFDM) channels in hybrid wavelength division multiplexed (WDM) systems. Given that XPM-induced phase noise is the dominant impairment, a combination of OFDM and double sideband modulation is presented in this paper to mitigate XPM-induced phase noise, which is investigated in frequency domain and time domain. Monte Carlo simulation results indicate that the variance of XPM-induced phase noise can be reduced with intermediate frequency (IF) of optical OFDM increasing and the BER performance of QPSK signal can be improved.
Keywords :
Monte Carlo methods; OFDM modulation; error statistics; interference suppression; phase noise; quadrature phase shift keying; telecommunication channels; time-frequency analysis; wavelength division multiplexing; BER; IF; Monte Carlo simulation; QPSK-OFDM hybrid system; WDM system; XPM-induced interference mitigation; XPM-induced phase noise mitigation; cross-phase modulation; double sideband modulation; frequency domain; hybrid wavelength division multiplexed system; intermediate frequency; optical orthogonal frequency division multiplexing channel; time domain; Integrated optics; OFDM; Optical modulation; Optical transmitters; Phase noise; Phase shift keying; cross phase modulation (XPM); orthogonal frequency division multiplexing (OFDM); phase estimation; quadrature phase shift keying (QPSK);
Conference_Titel :
Optical Communications and Networks (ICOCN), 2015 14th International Conference on
Conference_Location :
Nanjing
DOI :
10.1109/ICOCN.2015.7203701
