Title :
Constant Envelop Minimum-Shift Keying OFDM Coherent Optical Communication System
Author :
Yang, Zhanyu ; Yu, Song ; Chen, Longquan ; Leng, Haijun ; Lan, Mingying ; Qiao, Yaojun ; Gu, Wanyi
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In this paper, we propose a constant envelop minimum-shift keying orthogonal frequency division multiplexing (CE-MSK-OFDM) modulation scheme. This scheme can mitigate the inherent drawbacks of CE quadrature phase shift keying OFDM (CE-QPSK-OFDM) and MSK-OFDM. Advantages of the proposed CE-MSK-OFDM modulation scheme are theoretically investigated. A CE-MSK-OFDM coherent optical experimental system is presented. In our experiment, 2.5 Gb/s CE-MSK-OFDM signal and 2.5 Gb/s CE-QPSK-OFDM signal are transmitted over a 100 km standard single mode fiber (SSMF) without phase compensation to check its advantages in mitigating intercarrier interference (ICI). In addition, performance under large fiber launch power is also measured to check its advantages in counteracting fiber nonlinear impairments. The experimental results show that the proposed system performs well in decreasing ICI and peak-to-average power ratio (PAPR) as the theoretical analysis reveals.
Keywords :
OFDM modulation; intercarrier interference; minimum shift keying; multiplexing; optical communication; quadrature phase shift keying; ICI; OFDM; QPSK; SSMF; bit rate 2.5 Gbit/s; coherent optical communication system; constant envelop minimum-shift keying; distance 100 km; intercarrier interference; modulation scheme; orthogonal frequency division multiplexing; peak-to-average power ratio; phase compensation; quadrature phase shift keying; standard single mode fiber; Integrated optics; Modulation; Optical attenuators; Optical receivers; Optical transmitters; Peak to average power ratio; Average received optical power; constant envelop (CE); intercarrier interference (ICI); minimum-shift keying (MSK); orthogonal frequency division multiplexing (OFDM); peak-to-average power ratio (PAPR); quadrature phase shift keying (QPSK);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2012.2224845
