On the Jamming Power Allocation for Secure Amplify-and-Forward Relaying via Cooperative Jamming

In this paper, we investigate secure communications in two-hop wireless relaying networks with one eavesdropper. To prevent the eavesdropper from intercepting the source message, the destination sends an intended jamming noise to the relay, which is referred to as cooperative jamming. This jamming n...

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Bibliographic Details
Published in:IEEE journal on selected areas in communications 2013-09, Vol.31 (9), p.1741-1750
Main Authors: Ki-Hong Park, Tian Wang, Alouini, Mohamed-Slim
Format: Article
Language:English
Subjects:
Amplify-and-forward relaying
Approximation methods
Cooperative jamming
Jamming
Physical layer security
Power allocation
Power demand
Relays
Resource management
Signal to noise ratio
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Summary:In this paper, we investigate secure communications in two-hop wireless relaying networks with one eavesdropper. To prevent the eavesdropper from intercepting the source message, the destination sends an intended jamming noise to the relay, which is referred to as cooperative jamming. This jamming noise helps protecting the source message from being captured reliably at the eavesdropper, while the destination cancels its self-intended noise. According to the channel information available at the destination, we derive three jamming power allocation strategies to minimize the outage probability of the secrecy rate. In addition, we derive analytic results quantifying the jamming power consumption of the proposed allocation methods.
ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2013.130908