Robust Beamforming for Secrecy Rate in Cooperative Cognitive Radio Multicast Communications

Van Dinh Nguyen, Trung Q. Duong, Oh-Soon Shin, Arumugam Nallanathan, George K. Karagiannidis

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

9 Citations (Scopus)


In this paper, we propose a cooperative approach to improve the security of both primary and secondary systems in cognitive radio multicast communications. During their access to the frequency spectrum licensed to the primary users, the secondary unlicensed users assist the primary system in fortifying security by sending a jamming noise to the eavesdroppers, while simultaneously protect themselves from eavesdropping. The main objective of this work is to maximize the secrecy rate of the secondary system, while adhering to all individual primary users' secrecy rate constraints. In the case of passive eavesdroppers and imperfect channel state information knowledge at the transceivers, the utility function of interest is nonconcave and involved constraints are nonconvex, and thus, the optimal solutions are troublesome. To address this problem, we propose an iterative algorithm to arrive at a local optimum of the considered problem. The proposed iterative algorithm is guaranteed to achieve a Karush-Kuhn-Tucker solution.
Original languageEnglish
Title of host publicationIEEE International Conference on Communications (ICC 2017): Proceedings
Number of pages6
ISBN (Electronic)978-1-4673-8999-0
Publication statusPublished - 31 Jul 2017

Publication series

NameEdit IEEE International Conference on Communications (ICC): Proceedings
ISSN (Electronic)1938-1883

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