Secure MISO cognitive radio system with perfect and imperfect CSI

Taesoo Kwon, Vincent W.S. Wong, Robert Schober

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Scopus citations

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.

Original languageEnglish
Title of host publication2012 IEEE Global Communications Conference, GLOBECOM 2012
Pages1236-1241
Number of pages6
DOIs
StatePublished - 2012 Dec 1
Event2012 IEEE Global Communications Conference, GLOBECOM 2012 - Anaheim, CA, United States
Duration: 2012 Dec 32012 Dec 7

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Other

Other2012 IEEE Global Communications Conference, GLOBECOM 2012
CountryUnited States
CityAnaheim, CA
Period12/12/312/12/7

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    Kwon, T., Wong, V. W. S., & Schober, R. (2012). Secure MISO cognitive radio system with perfect and imperfect CSI. In 2012 IEEE Global Communications Conference, GLOBECOM 2012 (pp. 1236-1241). [6503282] (GLOBECOM - IEEE Global Telecommunications Conference). https://doi.org/10.1109/GLOCOM.2012.6503282