DocumentCode :
1972508
Title :
Secure transmission via transmit antenna selection in MIMO wiretap channels
Author :
Nan Yang ; Phee Lep Yeoh ; Elkashlan, M. ; Schober, Robert ; Collings, Iain B.
Author_Institution :
CSIRO ICT Centre, Wireless & Networking Technol. Lab., Marsfield, NSW, Australia
fYear :
2012
fDate :
3-7 Dec. 2012
Firstpage :
789
Lastpage :
794
Abstract :
We propose and analyze transmit antenna selection (TAS) to enhance physical layer security in a wiretap channel with multiple antennas at the transmitter, the receiver, and the eavesdropper. We consider the practical scenario of passive eavesdropping, where the transmitter does not have any channel state information (CSI) of the eavesdropper´s channel. In the main channel between the transmitter and the receiver, we select a single antenna at the transmitter that maximizes the instantaneous signal-to-noise ratio (SNR) at the receiver. At the receiver and the eavesdropper, we consider two combining techniques: 1) maximal-ratio combining (MRC) and 2) selection combining (SC). For non-identical Rayleigh fading between the main channel and the eavesdropper´s channel, we first derive new closed-form expressions for the exact and asymptotic secrecy outage probabilities. The asymptotic results accurately reveal the secrecy diversity order and the secrecy array gain. Next, we derive new closed-form expressions for the probability of positive secrecy and characterize the ε-outage secrecy capacity. We show that, under TAS/MRC and TAS/SC protocols, the secrecy outage probability approaches zero and the ε-outage secrecy capacity increases with increasing number of transmitter antennas.
Keywords :
MIMO communication; Rayleigh channels; probability; protocols; radio receivers; radio transmitters; telecommunication security; transmitting antennas; CSI; MIMO wiretap channels; Rayleigh fading channel; SNR; TAS/MRC protocols; TAS/SC protocols; channel state information; eavesdropper channel; maximal-ratio combining; outage probabilities; physical layer security; receiver; secure transmission; selection combining; signal-to-noise ratio; transmit antenna selection; transmitter;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Communications Conference (GLOBECOM), 2012 IEEE
Conference_Location :
Anaheim, CA
ISSN :
1930-529X
Print_ISBN :
978-1-4673-0920-2
Electronic_ISBN :
1930-529X
Type :
conf
DOI :
10.1109/GLOCOM.2012.6503209
Filename :
6503209
Link To Document :
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