Secure MISO cognitive radio system with perfect and imperfect CSI
Kwon T, Wong VW, Schober R (2012)
Publication Type: Conference contribution
Publication year: 2012
Pages Range: 1236-1241
Conference Proceedings Title: GLOBECOM - IEEE Global Telecommunications Conference
Event location: Anaheim
ISBN: 9781467309219
DOI: 10.1109/GLOCOM.2012.6503282
Abstract
In cognitive radio (CR) systems, harmful interference from the secondary system degrades the data rate of the primary system. However, this interference may be beneficial to the primary system in terms of the secrecy rate, when unauthorized users eavesdrop on the primary link. This paper explores multiple-input single-output (MISO) CR systems where the secondary system secures the primary communication in return for permission to use the spectrum. In this context, the optimal transmission strategy has to be found which provides the best tradeoff between the useful and harmful effects of interference on the secrecy rate of the primary system. Considering the cases of perfect and imperfect channel state information of the eavesdroppers we formulate optimization problems for maximizing the primary secrecy rate under secondary data rate requirements. The resulting non-convex optimization problems are solved through a sequence of convex semidefinite programs. The simulation results reveal that the proposed schemes improve the secrecy level of the primary system while meeting the data rate requirements of the secondary system. © 2012 IEEE.
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APA:
Kwon, T., Wong, V.W., & Schober, R. (2012). Secure MISO cognitive radio system with perfect and imperfect CSI. In GLOBECOM - IEEE Global Telecommunications Conference (pp. 1236-1241). Anaheim, US.
MLA:
Kwon, Taesoo, Vincent W.S. Wong, and Robert Schober. "Secure MISO cognitive radio system with perfect and imperfect CSI." Proceedings of the 2012 IEEE Global Communications Conference, GLOBECOM 2012, Anaheim 2012. 1236-1241.
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