Long, Hang, Xiang, Wei, Wang, Jing, Zhang, Yueying, Zhao, Hui, and Wang, Wenbo (2013) Cooperative jamming and power allocation in two-way relaying system with eavesdropper. In: Proceedings of the 2013 IEEE 78th Vehicular Technology Conference. From: 2013 IEEE 78th Vehicular Technology Conference, 2-5 September 2013, Las Vegas, NV, USA.

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Abstract

The security of the two-way relaying system with an eavesdropper is investigated in this paper. A cooperative jamming and power allocation scheme is proposed to enhance the system secrecy capacity. Both user and pre-defined jamming signals are transmitted by each source node simultaneously. The optimum power allocation between the user and jamming signals at each source node is derived. Our analytical results suggest that the proposed cooperative jamming scheme improves on the system secrecy capacity, especially when the channel gains of the two source-relay links are of large difference. Simulation results in close agreement with analytical results clearly demonstrate the advantage of the proposed cooperative jamming scheme.

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