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The Physical Layer Security (PLS) technology has been proved to be an effective way to reduce information leakage in wireless communication networks. This paper discusses the problem of secure transmission for Amplify-and-Forward (AF) cooperative network which contains both an external eavesdropper and some untrusted relays at the same time, where each relay acts as a helper of transmitting information...
Alice aims at transmitting Bob a message to be kept secret from Eve, with the assistance of relays operating in a decode-and-forward fashion. Each link between node couples comprises a set of parallel channels. Both Alice and relays knows all legitimate channel gains, while they only have a statistical knowledge of the channels to Eve. By fixing a secrecy outage probability per channel, we optimize...
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