NDLI: Secure Cooperative Communication via Artificial Noise for Wireless Two-Hop Relaying Networks

Content Provider	Springer Nature Link
Author	Zhou, Nan Run Kang, Zhi Juan Liang, Xiao Rong
Copyright Year	2015
Abstract	A two-hop relaying system for secrecy cooperative communication in the presence of an eavesdropper is investigated, where each relay node is equipped with a unitary matrix and cooperates to transmit the received signals, which can partly mitigate the deep channel fade. Gaussian distributed artificial noise (AN) is added in the null space of the intended receiver to ensure the secrecy of communication and achieve a better secrecy capacity while only the wiretap channel is degraded. The secrecy capacity and the optimal power distribution are studied in two scenarios, AN added by the transmitter and AN added by the cooperative relay nodes. Also, a sub-optimal power distribution strategy independent of the channel state information of eavesdropper is proposed to alleviate the computational overhead. The analytical results are confirmed by simulations that it is better to distribute more power to the available signals if the main channel is better, while more power to AN if the wire-tap channel is better. The sub-optimal power distribution can attain close performance compared with the optimal power distribution strategy but with substantially reduced computational complexity.
Starting Page	1759
Ending Page	1771
Page Count	13
File Format	PDF
ISSN	09296212
Journal	Wireless Personal Communications
Volume Number	82
Issue Number	3
e-ISSN	1572834X
Language	English
Publisher	Springer US
Publisher Date	2015-01-30
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Secrecy capacity Distributed space-time codes Power distribution Artificial noise Amplify-and-forward scheme Communications Engineering, Networks Signal, Image and Speech Processing Computer Communication Networks
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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