Title :
Coherent optical fibre digital PPM employing Reed-Solomon error correcting codes
Author :
Cryan, R.A. ; Unwin, R.T.
Author_Institution :
Dept. of Electr. & Electron. Eng., Huddersfield Polytech., UK
Abstract :
In recent literature digital PPM has been shown to be an effective modulation format for optical communication channels. In this paper the authors show how Reed-Solomon codes, used in conjunction with digital PPM, can further improve receiver sensitivity. They present computer predicted results, at a bit-rate of 565 Mbit/s and a wavelength of 1.5 μm, comparing both uncoded and coded homodyne digital PPM with coherent PCM. It is concluded that the Reed-Solomon coded system offers an improvement of 4 dB over the uncoded system and 9 dB over homodyne PSK PCM
Keywords :
digital communication systems; error correction codes; error statistics; optical communication; optical fibres; optical links; pulse position modulation; 1.5 micron; 565 Mbit/s; ECC; Reed-Solomon codes; coherent optical fibre links; digital PPM; error correcting codes; error probability; modulation format; optical communication channels; receiver sensitivity;
Conference_Titel :
Coherent Optical Communications, IEE Colloquium on
Conference_Location :
London
