Covert Backscatter Communication with Directional MIMO
URL
Journal Title
Journal ISSN
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Sähkötekniikan korkeakoulu |
Master's thesis
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Authors
Date
2022-08-22
Department
Major/Subject
Communications Engineering
Mcode
ELEC3029
Degree programme
CCIS - Master’s Programme in Computer, Communication and Information Sciences (TS2013)
Language
en
Pages
37+8
Series
Abstract
In this work, a protocol for backscatter communication is studied over an additive white Gaussian noise (AWGN) channel. The system model consists of a multi-antenna transmitter Bob which illuminates the tag Alice with a directional generated beam. The physical presence of the tag is hidden from the warden Willie and it load modulates the signal. The results show that theta(n) covert and reliable bits can be communicated for n−channel usages and by overcoming the square root law (SRL) in covert communication. The results rely on the structural mode of the Alice antenna and how much the transmitted signal is out of reach for Willie. This work gives the first practical evidence for feasible implementation of covert backscatter communication and its possible applications in Internet of Things (IoT) security.Description
Supervisor
Jäntti, RikuThesis advisor
Di Candia, RobertoKeywords
covert communication, backscatter communication, MIMO, covert bits, structural mode