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Joint effect of jamming and noise on the secrecy outage performance of wiretap channels with feedback delay and multiple antennas
Author(s) -
Ortega Yosbel R.,
Upadhyay Prabhat K.,
Costa Daniel Benevides,
Bithas Petros S.,
Kanatas Athanasios G.,
Dias Ugo S.,
de Sousa Junior Rafael Timoteo
Publication year - 2017
Publication title -
transactions on emerging telecommunications technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 47
ISSN - 2161-3915
DOI - 10.1002/ett.3191
Subject(s) - jamming , transmitter , secrecy , computer science , antenna diversity , channel state information , imperfect , antenna (radio) , signal to noise ratio (imaging) , topology (electrical circuits) , joint (building) , telecommunications , noise (video) , diversity gain , channel (broadcasting) , fading , wireless , computer security , engineering , physics , electrical engineering , architectural engineering , linguistics , philosophy , image (mathematics) , artificial intelligence , thermodynamics
In this paper, we investigate the secrecy performance of multiple‐input–multiple‐output wiretap channels with outdated channel state information (CSI) at the transmitter. The joint effect of multiple jamming signals and noise at the eavesdropper is studied assuming that the transmitter adopts a transmit antenna selection technique, while both the legitimate receiver and the eavesdropper use a maximal‐ratio combining scheme to achieve spatial diversity in reception. Exact closed‐form expressions for the nonzero secrecy rate probability and the secrecy outage probability for an arbitrary number of power distributed jamming signals are derived, by assuming both perfect and imperfect CSI. The general secrecy outage probability expressions are simplified for 2 special cases, ie, different and equal power distributed interferers. Furthermore, we conduct an asymptotic secrecy outage analysis at high signal‐to‐noise ratio, which reveals that the expected diversity gain cannot be realized for imperfect CSI and full diversity order can only be achieved under the perfect CSI condition. In addition, our results reveal that the number of antennas at the eavesdropper as well as the number of jamming signals do not affect the system diversity order. Simulation results are performed to illustrate the effects of imperfect feedback and other key system parameters on the secrecy performance. Finally, our analytical results are validated through Monte Carlo simulations.