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In this paper we investigate energy-efficient cooperation for secrecy in cognitive radio networks. We consider a four-node cognitive scenario where the secondary receiver is treated as a potential eavesdropper with respect to the primary transmission. In particular we consider three transmission schemes for the secondary transmitter, namely pure cooperative jamming, clean relaying, and interference...
In this paper we study secure communications with weak secrecy constraint in a cognitive radio channel, where the secondary receiver is treated as a potential eavesdropper with respect to the primary transmission. The primary's secrecy rate and the transmission scheme should be kept unchanged whether the secondary users transmit or not. We derive the achievable rate of the discrete memoryless multi-phase...
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