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
Author:
Σμπόνιας Νικόλαος
Supervisors info:
Μεράκος Λάζαρος Καθηγητής ΕΚΠΑ
Original Title:
Τεχνικές μετάδοσης και λήψης για γνωστικές ραδιοεπικοινωνίες: ποιοτική σύγκριση OFDM και FBMC
Translated title:
Communication Techniques in Cognitive Radios: a qualitative comparison of OFDM and FBMC
Summary:
The usage of radio spectrum resources and the regulation of radio emissions are
coordinated by national regulatory bodies .Spectrum is assigned to licensed
holders (primary users), on a long-term basis for large geographical regions.
However, a large portion of the assigned spectrum remains underutilized. The
inefficient usage of the limited spectrum necessitates the development of
dynamic spectrum access techniques, where users who have no spectrum licenses
(secondary users), are allowed to use the temporarily unused licensed
spectrum.In recent years, there are more flexible and comprehensive uses of the
available spectrum, through the use of cognitive radio technology. Orthogonal
frequency division multiplexing has been the dominant technology for broadband
multicarrier communications (OFDMA). However, in cognitive radios and uplink of
multiuser multicarrier systems, OFDM may be an undesirable solution.
The aim of this study is to analyze the OFDM and OFDMA in cognitive radio and
compared with the filter banks in multicarrier communications (FBMC) which
could be a more effective solution for the detection of the spectrum.
Presents the advantages and similarities of the two techniques (OFDMA and
FMBC). Analyze the spectrum sensing techniques on the challenges to be faced
and highlights the similarities of these techniques to filter banks.
Keywords:
Cognitive radio, Spectrum holes, Spectrum sensing, Orthogonal frequency division multiple access OFDMA , Filterbanks Multicarrier FBMC
Number of index pages:
52,53,54,56,57
