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Scatter radio relaying & applications

Vougioukas Georgios

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URIhttp://purl.tuc.gr/dl/dias/9F35BB5A-DB5F-4151-A1DA-BAC7CD53580D-
Αναγνωριστικόhttps://doi.org/10.26233/heallink.tuc.88031-
Γλώσσαen-
Μέγεθος15 megabytesen
Μέγεθος158 pagesen
ΤίτλοςScatter radio relaying & applicationsen
ΔημιουργόςVougioukas Georgiosen
ΔημιουργόςΒουγιουκας Γεωργιοςel
Συντελεστής [Επιβλέπων Καθηγητής]Bletsas Aggelosen
Συντελεστής [Επιβλέπων Καθηγητής]Μπλετσας Αγγελοςel
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Karystinos Georgiosen
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Καρυστινος Γεωργιοςel
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Κωνσταντίνος Παπαδιάςel
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Constantinos Papadiasen
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Gregory Durginen
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Αναστάσης Πολυκάρπουel
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Anastasis Polycarpouen
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Koutroulis Eftychiosen
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Κουτρουλης Ευτυχιοςel
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Paterakis Michalisen
Συντελεστής [Μέλος Εξεταστικής Επιτροπής]Πατερακης Μιχαληςel
ΕκδότηςΠολυτεχνείο Κρήτηςel
ΕκδότηςTechnical University of Creteen
Ακαδημαϊκή ΜονάδαTechnical University of Crete::School of Electrical and Computer Engineeringen
Ακαδημαϊκή ΜονάδαΠολυτεχνείο Κρήτης::Σχολή Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστώνel
ΠερίληψηBillions of devices are expected to be wirelessly connected in the foreseeable future. Sustaining such connectivity will require simple, elegant, engineering solutions. Based on backscatter radio principles, this dissertation offers novel, ultra-low-complexity, ultra-low-power, ultra-low-cost solutions, for connectivity in the field of narrowband wireless communications. Methods for achieving wireless communication by “recycling” radio waves, pre-existing in the environment, are offered and analysed. In contrast to generating own signals for transmission, a device (tag) adopting the suggested methods can transmit its information towards any conventional FM radio receiver, by recycling ambient signals from FM radio stations. That way, it is shown that batteryless information transmission can be achieved up to distances of 26 meters, by harvesting energy from the environment. Ultra-low cost prototypes consumed only 24 μWatt in continuous (non duty-cycled) operation. In the case of ambient signals of unknown origin and structure, digital modulation schemes are also offered, accompanied by novel coherent, partially-coherent illumination-agnostic, as well as fully noncoherent, channel-coded or uncoded detection algorithms. It is shown that under certain conditions, modulated and unknown ambient signals, can offer performance gains in the process of recovering tag's information signal, i.e., modulation of the ambient signal may be helpful. The proposed schemes do not require any cooperation with the ambient transmitter. That way, in sharp contrast to prior art, the tags adopting the proposed techniques are receiver-less; ultra-low-complexity and batteryless operation are also facilitated. Exploiting the aforementioned methods, originally intended for solving ambient backscatter communication problems, it is demonstrated for the first time that backscattering tags can also be used in an unorthodox way, for relaying signals in the frequency domain. Scatter radio relaying can be used to solve multi-antenna processing problems: a) blind (i.e., zero-feedback) beamforming, offering power gains in the order of 0.4-3.7 dB, and b) direction of arrival (DoA) estimation, offering error less than 5 degrees with 8 scattering tags. The proposed methods utilize single antenna radios without any requirement for channel feedback, multi-antenna RF front-ends or expensive controllers. The proposed techniques extend the solution space for engineers building wireless devices under power, complexity and cost constraints. Hopefully, this work will amplify the recent interest of the research community on backscatter radio and accelerate efforts towards the wide adoption of backscatter radio relaying in current and future commodity wireless systems, sensors and networks.en
ΤύποςΔιδακτορική Διατριβήel
ΤύποςDoctoral Dissertationen
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by-nc-sa/4.0/en
Ημερομηνία2021-01-08-
Ημερομηνία Δημοσίευσης2020-
Θεματική ΚατηγορίαWireless communicationsen
Θεματική ΚατηγορίαBackscatter radioen
Θεματική ΚατηγορίαAmbient backscatteren
Θεματική ΚατηγορίαUltra low power communicationsen
Βιβλιογραφική ΑναφοράGeorgios Vougioukas, "Scatter radio relaying & applications", Doctoral Dissertation, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2020en

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