Study of underwater optical wireless communications

Postgraduate Thesis uoadl:1318850 283 Read counter

Unit:
Κατεύθυνση Ηλεκτρονική και Ραδιοηλεκτρολογία (Ρ/Η, με πρόσθετη εξειδίκευση στις Τηλεπικοινωνίες και στην επεξεργασία και διοίκηση της Πληροφορίας)
Library of the School of Science
Deposit date:
2014-06-17
Year:
2014
Author:
Γκούρα Λυδία
Supervisors info:
Ε. Νισταζάκης Επίκ. Καθηγητής ΕΚΠΑ (Επιβλέπων), Γ. Τόμπρας Καθηγητής ΕΚΠΑ, Κ. Αϊδίνης, Αναπλ. Καθηγητής ΕΚΠΑ
Original Title:
Μελέτη υποθαλάσσιων ασύρματων τηλεπικοινωνιακών συστημάτων στην περιοχή των οπτικών συχνοτήτων
Languages:
Greek
Translated title:
Study of underwater optical wireless communications
Summary:
The growing need for secure and high speed underwater telecommunication systems
has stimulated very considerable interest. Thus, the underwater optical
wireless communications (UOWC) attract significant research attention due to
the fact that they provide a cost-effective and low energy consumption solution
that can achieve high data-rates transmission, strong anti-jamming ability and
security between the transmitter and the receiver. The technology that is
mostly used nowadays, among divers, ships etc, is the one with acoustic waves
but this technology supports low baud rates and does not ensure the link’s
security while the information signal’s delay is very big. On the other hand,
the UOWC’s effective range is lower, due to the higher attenuation in these
frequencies, but the communications are very fast and secure, the delay is
practically minimal and many multiplexing schemes can be used in order to
achieve higher capacities (i.e. WDM, TDM, etc) and thus greater performance
characteristics. The main disadvantage of the scientific area of UOWC is the
relatively low propagation distances and the main goal is to find the ways to
minimize the influence of the signal’s mitigation factors. In this work, we
make an introduction to this significant new research area and technology and
we present the main factors, their influence and how they decrease the systems’
performance. Additionally, we show the ways and the solutions which have been
already proposed, in order to minimize their impact, along with many
experimental results which have been presented in many work in this scientific
area.
Keywords:
Wireless Optical Communications, Underwater Optical Communications
Index:
No
Number of index pages:
0
Contains images:
Yes
Number of references:
38
Number of pages:
43
File:
File access is restricted.

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