Title :
Hybrid Modulated Multiband Coherent Optical OFDM for Low-Complexity Phase Noise Compensation
Author :
Xi Chen ; Jiayuan He ; Di Che ; Shieh, W.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Melbourne, Melbourne, VIC, Australia
Abstract :
In this paper, we propose and demonstrate effective laser phase noise compensation for coherent optical orthogonal frequency-division multiplexing (OFDM) systems that have long OFDM symbols. The phase noise compensation is achieved via hybrid modulated multiband optical OFDM, aided by the digital filter bank technique. For this, one of the multiple subbands is modulated as discrete Fourier transform spread OFDM. Our experimental results show that laser phase noise up to 1 MHz can be compensated for 114.8-Gb/s 16-QAM signals with 480-km standard single mode fiber transmission.
Keywords :
OFDM modulation; digital filters; laser noise; light coherence; optical communication equipment; optical fibre communication; optical fibre filters; optical modulation; phase noise; digital filter bank technique; discrete Fourier transform spread OFDM; distance 480 km; hybrid modulated multiband coherent optical OFDM; low-complexity laser phase noise compensation; orthogonal frequency-division multiplexing; single mode fiber transmission; Complexity theory; Digital signal processing; Filter banks; Laser noise; OFDM; Optical noise; Phase noise; Coherent optical orthogonal frequency-division multiplexing (OFDM); digital filter bank; laser phase noise;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2358373
