Subcarrier Allocation for Physical-Layer Security in Cooperative OFDMA Networks

Chunxiao CAI  Yueming CAI  Weiwei YANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.12   pp.3387-3390
Publication Date: 2011/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.3387
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Cooperative Communications for Cellular Networks)
Category: 
Keyword: 
physical-layer security,  cooperative OFDMA networks,  amplify-and-forward,  subcarrier pairing,  

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Summary: 
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.