Abstract
Physical-layer security can offer confidential communications from an information-theoretic viewpoint. This letter focuses on the secrecy rate optimization in presence of an eavesdropper, investigating the cases of direct and cooperative communications. Particularly, the problem of joint power and confusion rate management to provide optimal secrecy rate under admissible information leakage is studied. A secrecy outage constraint and no instantaneous channel state information of eavesdropper’s link are assumed. Due to the nonconvexity of the problem, difference of convex functions (DC) programming is employed and a low complexity algorithm is proposed. The performance of the proposed mechanism is evaluated through extended simulations.
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