Title :
Resource Allocation for Secure Multicarrier AF Relay System Under Total Power Constraint
Author :
Jindal, Abhishek ; Bose, Ranjan
Author_Institution :
Bharti Sch. of Telecommun. Technol. & Manage., Indian Inst. of Technol. Delhi, New Delhi, India
Abstract :
In this letter, we consider an amplify-and-forward-relay-aided secure multicarrier communication between two nodes with an eavesdropper. We solve the sum secrecy rate maximization problem by solving the following two problems: 1) subcarrier usage policy at the source and the relay; and 2) power allocation among subcarriers between the source and the relay under a total system power constraint. We provide a suboptimal closed-form solution to the problem that involves mixed-integer variables and a nonlinear fractional function. The numerical results demonstrate an improved sum rate by the proposed scheme over a scenario without relay.
Keywords :
amplify and forward communication; channel allocation; integer programming; relay networks (telecommunication); telecommunication security; amplify and forward relay aided secure multicarrier communication; mixed integer variables; nonlinear fractional function; power allocation; resource allocation; secure multicarrier AF relay system; subcarrier usage policy; suboptimal closed form solution; sum secrecy rate maximization problem; system power constraint; Approximation methods; Equations; Optimization; Physical layer; Relays; Resource management; Security; Physical layer security; amplify-and-forward relay; amplifyand- forward relay; physical layer security; secure multicarrier communication; secure sum rate;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2379652
