Open AccessA high spectral efficiency optical OFDM scheme based on interleaved multiplexing
Author(s) -
Cheng Lei,
Hongwei Chen,
Minghua Chen,
Shizhong Xie
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.026149
Subject(s) - orthogonal frequency division multiplexing , multiplexing , spectral efficiency , orthogonality , transmission (telecommunications) , modulation (music) , computer science , optics , channel (broadcasting) , electronic engineering , fast fourier transform , bit error rate , sideband , physics , algorithm , telecommunications , mathematics , radio frequency , engineering , geometry , acoustics
By multiplexing two OFDM signals with the same channel space and bit rate together in an interleaved mode, a novel optical multiplexing scheme is proposed and experimentally demonstrated. Since the channel space is halved, the spectral efficiency is doubled compared with conventional OFDM. It is proved that the orthogonality between the subcarriers is maintained as long as the data is real. With discrete Fourier transform, the proposed scheme has similar computational complexity as conventional OFDM and single sideband modulation is conveniently achieved. A 10 Gb/s transmission system is set up, and proves the feasibility and efficiency of the scheme experimentally.