Συντάχθηκε 15-05-2013 09:16
από Eleni Stamataki
Email συντάκτη: estamataki<στο>tuc.gr
Ενημερώθηκε:
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Ιδιότητα: σύνταξη/αποχώρηση υπάλληλος.
Τμήμα Ηλεκτρονικών Μηχανικών & Μηχανικών Υπολογιστών
ΠΑΡΟΥΣΙΑΣΗ ΔΙΠΛΩΜΑΤΙΚΗΣ ΕΡΓΑΣΙΑΣ
ΣΑΠΟΥΝΤΖΗ ΝΙΚΟΛΑΟΥ
με θέμα
“Ακύρωση Παρεμβολών σε Ασύρματες Επικοινωνίες”
“Interference Cancellation in Wireless Communications”
Παρασκευή 17 Μαΐου 2013, 13.00 μ.μ
Αίθουσα 145.Π58, Κτίριο Επιστημών, Πολυτεχνειούπολη
Εξεταστική Επιτροπή
Καθ. Λιάβας Αθανάσιος (επιβλέπων)
Επ. Καθ. Μπλέτσας Άγγελος
Καθ. Πατεράκης Μιχαήλ
Abstract
One of the most significant problems in wireless communications is interference. Indeed, there are a lot of different kinds of interference. In this thesis, we consider point-to-point systems which are interfered from unwanted sources which communicate simultaneously over the same frequency band.
At the beginning, we study the ``Reciprocity" Property and we check whether the channel reciprocity property holds true in practice. Using the Universal Software Radio Peripherals (USRPs), we observe that it does not hold true, due to the non-symmetric characteristics of the RF electronic circuits.
Then, we study a scenario which includes two co-existing and interfering point-to-point wireless links. Each transmitter, knowing the channels to its unintended receiver, is able to pre-cancel its induced interference. We verify the related concepts by implementing the channel feedback and beamforming techniques on a USRP testbed, and we observe interference cancellation at the unintended receivers.
