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PhD Defense of Fatima BARRAMI

Published on April 3, 2015
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April 9, 2015 | Access map
Defense of a doctoral thesis of  Fatima BARRAMI   for the University of Grenoble,  speciality " Signal Image Parole Telecoms entitled:
Room M253 - Phelma /MINATEC
3 Parvis Louis Néel - CS 50257
38016 Grenoble Cedex 01

" Low-complexity direct detection optical OFDM systems for high data rate communications."

Melle Fatima BARRAMI

Melle Fatima BARRAMI

Thursday, April 9, 2015 at  10:00

Abstract:
A possible approach to maximize the data rate per wavelength, is to employ the high spectral efficiency discrete multitone (DMT) modulation. The work presented in this thesis mainly focuses on optimizing the power consumption and cost of DMT, that are the major obstacles to its market development.
Within this context, we have first developed novel techniques permitting to discard the use of Hermitian symmetry in DMT modulations, thus significantly reducing the power consumption and the system cost. We have next proposed an asymmetric linear companding algorithm permitting to reduce the optical power of conventional DCO-OFDM modulation with a moderate complexity.
A new VCSEL behavioural model based on the use of the VCSEL quasi-static characteristic was also developed to accurately evaluate the VCSEL impact on DMT modulations.
Finally, we have built an experimental system to experimentally validate our proposed techniques.  Several simulations and measurement results are then provided.

Members of  jury :
Emil NOVAKOV - Supervisor
Yannis LE GUENNEC - Co Supervisor
Pierre BUSSON - Co Supervisor
Christelle AUPETIT - Rapporteur
Mohammad-Ali KHALIGUI - Rapporteur
Bruno FRACASSO - Examiner


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Partenaires

Thesis prepared in the laboratory  IMEP-LaHC supervised by Emil NOVAKOV

Date of update April 3, 2015

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IMEP-LAHC
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Grenoble INP - Minatec : 3, Parvis Louis Néel - CS 50257 - 38016 Grenoble Cedex 1

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