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

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