Nasiri, Mostafa
(2024)
Experimental Study of a System for Compensating the Temperature-Induced Gain Fluctuations of the Radio-over-Fiber links used in the Square Kilometre Array.
[Laurea magistrale], Università di Bologna, Corso di Studio in
Telecommunications engineering [LM-DM270]
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Abstract
The Square Kilometer Array-low (SKA-low) system requirements for high sensitivity and
dynamic range are met in large part by the signal reception chain. The choice of architecture
and receiver system design for SKA-low is influenced by the trade-off between gain, linearity,
and low power consumption as well as cost, high reliability, robustness under extreme
environments, and finally, the distance between the antennas and the acquisition systems. RFover-fiber systems have been chosen as the technology for the SKA-low RF signal conveyance.
Together with explanations of the creation of the receiver prototypes, the selection's
justifications are presented. At the chosen SKA-low site in Western Australia, the prototypes
were set up and put on demonstrator arrays. The thermal characterization of the receiver system
has received particular focus, especially when both the optical medium and the transmitting
component are subject to fluctuations in the ambient outside temperature. For this reason,
particular emphasis has been placed on the analysis of optical receivers, both those currently
used in AAVS2 and those that will be used for in the future for AAVS3. Finally, several
simulations were conducted using software developed to describe the behavior of signals
received following propagation through RF-over-fiber systems under certain environmental
conditions.
Abstract
The Square Kilometer Array-low (SKA-low) system requirements for high sensitivity and
dynamic range are met in large part by the signal reception chain. The choice of architecture
and receiver system design for SKA-low is influenced by the trade-off between gain, linearity,
and low power consumption as well as cost, high reliability, robustness under extreme
environments, and finally, the distance between the antennas and the acquisition systems. RFover-fiber systems have been chosen as the technology for the SKA-low RF signal conveyance.
Together with explanations of the creation of the receiver prototypes, the selection's
justifications are presented. At the chosen SKA-low site in Western Australia, the prototypes
were set up and put on demonstrator arrays. The thermal characterization of the receiver system
has received particular focus, especially when both the optical medium and the transmitting
component are subject to fluctuations in the ambient outside temperature. For this reason,
particular emphasis has been placed on the analysis of optical receivers, both those currently
used in AAVS2 and those that will be used for in the future for AAVS3. Finally, several
simulations were conducted using software developed to describe the behavior of signals
received following propagation through RF-over-fiber systems under certain environmental
conditions.
Tipologia del documento
Tesi di laurea
(Laurea magistrale)
Autore della tesi
Nasiri, Mostafa
Relatore della tesi
Correlatore della tesi
Scuola
Corso di studio
Ordinamento Cds
DM270
Parole chiave
Radio-over-Fiber (RoF) Systems,Optical Fiber Transmission,Radio Astronomy,System Optimization
Data di discussione della Tesi
18 Marzo 2024
URI
Altri metadati
Tipologia del documento
Tesi di laurea
(NON SPECIFICATO)
Autore della tesi
Nasiri, Mostafa
Relatore della tesi
Correlatore della tesi
Scuola
Corso di studio
Ordinamento Cds
DM270
Parole chiave
Radio-over-Fiber (RoF) Systems,Optical Fiber Transmission,Radio Astronomy,System Optimization
Data di discussione della Tesi
18 Marzo 2024
URI
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