Title: Achieving secure communications in multi-antenna cooperative cognitive radio networks using cooperative jamming

Authors: Zhen Li; Tao Jing; Yan Huo; Jin Qian

Addresses: School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing 100044, China ' School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing 100044, China ' School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing 100044, China ' School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing 100044, China

Abstract: Multi-antenna based cooperative cognitive radio networks (MCCRNs) have been proposed recently to further improve the spectrum efficiency. Secure communications may be impeded by the eavesdropper in MCCRNs. In this paper, we use physical layer methods to prevent the eavesdropping attack. A cooperative jamming scheme is proposed, in which SUs are employed as helpers to send jamming signals. We optimise the design of beamformers and power allocation vectors to maximise secrecy capacity. To further improve the secrecy capacity, we design an effective cooperation strategy of helpers using coalition formation game. Based on the merge-and-split rules, a coalition formation algorithm is proposed.

Keywords: MCCRNs; multiple antennas; cooperative CRNs; cognitive radio networks; cooperative jamming; eavesdropping attacks; coalition formation games; secure communications; communication security; network security; jamming signals; beamformer design; power allocation vectors.

DOI: 10.1504/IJSNET.2016.079598

International Journal of Sensor Networks, 2016 Vol.22 No.2, pp.100 - 110

Received: 07 Jul 2016
Accepted: 18 Jul 2016
Published online: 04 Oct 2016 *

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