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PhD defense of Ramin KHAYATZADEH

Published on September 21, 2015
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September 22, 2015 | Access map
Thesis defense of Ramin KHAYATZADEH  for a DOCTORAL thesis at the University of Grenoble,  Optics and Radio frequencies speciality, entitled:
Auditorium M001-Grenoble INP - Phelma
3 Parvis Louis Néel - CS 50257
38016 Grenoble Cedex 01

"Convergence of Radio and Optical technologies for communication systems at frequencies higher than 60 GHz. "

Ramin KHAYATZADEH

Ramin KHAYATZADEH

Tuesday, September 22,  2015 at  9:30

Abstract:
This Ph.D. investigates the radio over fiber communication systems at mm-wave frequencies higher than 60 GHz. The thesis elaborates on three crucial issues in these systems including:
phase noise measurement of unstable optically generated mm-wave signals, elimination of phase noise impact on performance of radio over fiber systems using non-coherent down conversion technique, and studying the amplitude noise impacts on performance of system based on these detectors.
  • In the first part of this work, a new digital phase noise measurement technique is presented which is able to extract the phase noise of any unstable mm-wave optically generated signal. This technique is able to measure the phase noise for a wide range of offset frequencies from close-in phase noise to far noise floor by adapting frequency resolution ofmeasurement and without considering small angle approximation.
     
  • In the second part, we present a radio over fiber system at mm-wave frequency based on non-coherent electrical frequency down conversion stage using an envelope detector which is robust against phase and frequency fluctuations of the optically generated carrier signal.
Finally, a theoretical and experimental study of amplitude noise impact on performance of radio over fiber systems based on non-coherent receivers is presented. In this study, a simulation technique based on theory is developed which is able to determine, among different optical and electrical noise, the one which has the dominant effect on EVM results.
This simulation technique is based on observing the EVM evolution versus received optical power.


Members of the jury :
• Bétrice CABON : Supervisor
• Julien POETTE : Co-supervisor
• Jean-Pierre VILCOT : Reviewer
• Tchanguiz RAZBAN HAGHIGHI : Rapporteur
• Olivier LLOPIS : Rapporteur

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Partenaires

Thesis prepared in the laboratoiry  IMEP-LaHC  supervised by  Béatrice CABON (EEATS) , supervisor,  and Julien POETTE, Cosupervisor .

Date of update October 6, 2015

Contact

Mrs CABON Béatrice
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Documents to download

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

Chambéry site
Université Savoie Mont Blanc - F73376 Le Bourget du Lac Cedex
 
 
  CNRS  http://www.cnrs.fr      Site Grenoble-INP http://www.grenoble-inp.fr       Université Grenoble Alpes (UGA)      Université Savoie Mont Blanc
Univ. Grenoble Alpes