Title :
Adaptive bit loading in FHT-based OFDM transponders for flexi-grid optical networks
Author :
Nadal, Laia ; Svaluto Moreolo, M. ; Fabrega, J.M. ; Junyent, G.
Author_Institution :
Centre Tecnol. de Telecomunicacions de C atalunya (CTTC), Castelldefels, Spain
Abstract :
In this paper, we propose to use adaptive bit loading (BL) in OFDM transponders based on the fast Hartley transform (FHT) for flexi-grid optical networks. A direct-detection (DD) optical system is implemented and a double-side band (DSB) signal with reduced guard band is transmitted for cost-sensitive applications. Different bit loading schemes are analysed to obtain a net data rate of 10 Gb/s for a maximum link of 120 km, occupying only one slot of 12.5 GHz or two slots of 6.25 GHz, according to the proposed spectrum sliced optical path network (SLICE) architecture.
Keywords :
OFDM modulation; optical fibre networks; optical modulation; transforms; transponders; DSB; FHT; FHT-based OFDM transponders; SLICE; adaptive bit loading; bit loading schemes; bit rate 10 Gbit/s; direct-detection optical system; distance 120 km; double-side band signal; fast Hartley transform; flexi-grid optical networks; frequency 12.5 GHz; frequency 6.25 GHz; reduced guard band; spectrum sliced optical path network architecture; Bandwidth; Loading; OFDM; Optical fiber networks; Optical fibers; Optical transmitters; FHT; Optical OFDM; bit loading; flexible grid;
Conference_Titel :
Transparent Optical Networks (ICTON), 2013 15th International Conference on
Conference_Location :
Cartagena
DOI :
10.1109/ICTON.2013.6602847
