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

fYear

2013

fDate

23-27 June 2013

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Transparent Optical Networks (ICTON), 2013 15th International Conference on

Conference_Location

Cartagena

ISSN

2161-2056

Type

conf

DOI

10.1109/ICTON.2013.6602847

Filename

6602847