Title :
Predistortion technique for mitigating the Mach-Zehnder modulator nonlinearity effect in DD-OFDM-UWB optical transmission systems
Author :
Vidak Vujičić;Adolfo Cartaxo
Author_Institution :
Group of Research on Optical Fibre Telecommunication Systems, Instituto de Telecomunicaç
fDate :
6/1/2011 12:00:00 AM
Abstract :
Predistortion of orthogonal frequency-division multiplexing (OFDM) ultra wideband (UWB) signals is proposed to mitigate the nonlinearity of Mach-Zehnder modulator used as electro-optical converter in direct-detection OFDM-UWB optical communication systems. Theoretical derivation of the predistorter characteristic is performed. Performance results in terms of error vector magnitude (EVM) obtained by numerical simulation of such OFDM-UWB system are presented and discussed. It is shown that 2.5 dB of improvement in the OFDM-UWB system performance can be obtained by using the presented predistortion technique.
Keywords :
"Modulation","Predistortion","OFDM","Optical noise","Optical transmitters","Signal to noise ratio"
Conference_Titel :
Transparent Optical Networks (ICTON), 2011 13th International Conference on
Print_ISBN :
978-1-4577-0881-7
Electronic_ISBN :
2161-2064
DOI :
10.1109/ICTON.2011.5970905
