Increasing Secrecy Capacity via Joint Design of Cooperative Beamforming and Jamming

• Xinrong Guan,
• Yueming Cai,
• Weiwei Yang,
• Yunpeng Cheng,
• Junquan Hu,

Vol. 6, No. 4, April 24, 2012
10.3837/tiis.2012.04.005, Download Paper (Free):

• physical layer security
• cooperative communication
• cooperative beamforming
• artificial jamming
• joint design

Abstract

In this paper, we propose a hybrid cooperative scheme to improve the secrecy rate for a cooperative network in presence of multiple relays. Each relay node transmits the mixed signal consisting of weighted source signal and intentional noise. The problem of power allocation, the joint design of beamforming and jamming weights are investigated, and an iterative scheme is proposed. It is demonstrated by the numerical results that the proposed hybrid scheme further improves secrecy rate, as compared to traditional cooperative schemes.

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