Subcarrier Allocation for Physical-Layer Security in Cooperative OFDMA Networks

Special Section on Cooperative Communications for Cellular Networks

Chunxiao CAI, National Mobile Communications Research Laboratory, Southeast University">Yueming CAI, Weiwei YANG

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Keywords: physical-layer security, cooperative OFDMA networks, amplify-and-forward, subcarrier pairing

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2011 Volume E94.B Issue 12 Pages 3387-3390

DOI https://doi.org/10.1587/transcom.E94.B.3387

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Abstract

Secrecy on the physical layer is receiving increased research interest due to its theoretical and practical importance. In this letter, a subcarrier allocation scheme is proposed for physical-layer security in cooperative orthogonal frequency division multiple access (OFDMA) networks that use the Amplify-and-Forward (AF) strategy. We consider the subcarrier pairing and assignment to maximize overall system rates subject to a secrecy level requirement. Monte Carlo simulations are carried out to validate our analysis.

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