Συντάχθηκε 06-08-2012 13:52
από Garantonaki Argyro
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ΠΟΛΥΤΕΧΝΕΙΟ ΚΡΗΤΗΣ
Τμήμα Ηλεκτρονικών Μηχανικών & Μηχανικών Υπολογιστών
ΠΑΡΟΥΣΙΑΣΗ ΜΕΤΑΠΤΥΧΙΑΚΗΣ ΕΡΓΑΣΙΑΣ
ΠΑΝΑΓΙΩΤΗ ΜΑΡΚΟΠΟΥΛΟΥ
με θέμα
“FULL-RATE DIFFERENTIAL ALAMOUTI ENCODING WITH 2/4/8-PSK MODULATION”
Τετάρτη 8 Αυγούστου 2012, 9:00 π.μ
Αίθουσα 145.Π42, Κτίριο Επιστημών, Πολυτεχνειούπολη
Εξεταστική Επιτροπή
Επ. Καθηγ. Καρυστινός Γεώργιος (επιβλέπων)
Καθηγ. Λιάβας Αθανάσιος
Επ. Καθηγ. Άγγελος Μπλέτσας
Περίληψη
Abstract
We consider Alamouti encoding that draws symbols from M-ary phase-shift keying (M-PSK) and develop a new differential modulation scheme that attains full rate for any constellation order. In contrast to past work, the proposed scheme guarantees that the encoded matrix maintains the characteristics of the initial codebook and, at the same time, attains full rate so that all possible sequences of space-time matrices become valid. Surprisingly, although the validity of all sequences could be thought as a drawback with respect to noncoherent sequence decoding, in fact it turns out to be an advantage. Based on recent results in the context of reduced-rank quadratic-form maximization over an M-PSK alphabet, we exploit the full-rate property of the proposed scheme to develop a polynomial-complexity ML noncoherent sequence decoder whose order is solely determined by the number of receive antennas. Numerical studies show the superiority of the proposed scheme in comparison with contemporary alternatives in terms of both encoding rate and decoding complexity.
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Anakoinwsi Markopoulos.doc
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