Research Article
Cooperative Beamforming and Jammer Selection Strategies for Two-Hop Secure Communication
@INPROCEEDINGS{10.4108/eai.15-8-2015.2261066, author={Hao Deng and Hui-Ming Wang and Chaowen Liu and Tong-Xing Zheng and Wenjie Wang}, title={Cooperative Beamforming and Jammer Selection Strategies for Two-Hop Secure Communication}, proceedings={10th EAI International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2015}, month={9}, keywords={physical layer security; cooperative jamming; jammer selection; cooperative communications}, doi={10.4108/eai.15-8-2015.2261066} }- Hao Deng
Hui-Ming Wang
Chaowen Liu
Tong-Xing Zheng
Wenjie Wang
Year: 2015
Cooperative Beamforming and Jammer Selection Strategies for Two-Hop Secure Communication
CHINACOM
IEEE
DOI: 10.4108/eai.15-8-2015.2261066
Abstract
In this paper, we propose a novel scheme to enhance the security of a single source-destination cooperative network with multiple helpers and one eavesdropper, where a helper operates as a jammer and the others use amplify-and-forward (AF) protocol to deliver a weighted version of the received signal. Since the instantaneous channel state information (CSI) of the eavesdropper is not available, we hope to achieve the maximum signal-to-noise ratio (SNR) and guarantee that the jamming signal is cancelled out at the destination. The weights of the relay can be obtained by just solving a semidefinite programming (SDP) without bisection search. We provide two jammer selection strategies for two cases, i.e., with or without knowledge of the eavesdropper’s position. Simulation results confirm a great improvement of the security in the considered network.
