Open AccessBidirectional 60-GHz radio-over-fiber systems with downstream OFDMA and wavelength reuse upstream SC-FDMA
Author(s) -
Cheng Zhang,
Jun Duan,
Juhao Li,
Weiwei Hu,
Hongbin Li,
Hequan Wu
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.18.019429
Subject(s) - downstream (manufacturing) , upstream (networking) , optical carrier transmission rates , wavelength division multiplexing , frequency division multiple access , orthogonal frequency division multiple access , optics , computer science , optical fiber , electronic engineering , wavelength , orthogonal frequency division multiplexing , radio over fiber , telecommunications , physics , engineering , channel (broadcasting) , operations management
We have proposed and experimentally demonstrated a 60-GHz bidirectional radio-over-fiber system with downstream orthogonal frequency division multiplexing address (OFDMA) and wavelength reuse upstream single-carrier frequency division multiple address (SC-FDMA). In the downstream, a 3-dB optical coupler is used for two-carrier injection-locking a distributed feedback (DFB) laser in order to realize the single-sideband modulation. In the upstream, the weakly modulated one of the two downstream carriers is filtered out for wavelength reuse. Transmission of 9.65-Gb/s 16-QAM downstream OFDMA on 60-GHz carrier and 5-Gb/s QPSK upstream SC-FDMA (2.5 Gb/s for each user) are both successfully demonstrated over 53-km standard single mode fiber without chromatic dispersion compensation. The crosstalk between the downstream OFDMA and the upstream SC-FDMA can be neglected.