Title :
Dynamic Power Allocation over Multiple-Access Channels for Secrecy-Rate Maximization
Author :
Mokari, Nader ; Arian, F. ; Parsaeefard, Saeedeh ; Le-Ngoc, Tho
Abstract :
In this paper, the dynamic power allocation problem over the multiple-access channel (MAC) against overhearing of eavesdroppers is investigated with the objective to maximize the users´ secrecy rate under transmitted power constraints. Lyapunov drift approach is applied to derive the sub-optimal solution for this inherent non-convex optimization problem. Convergence condition and performance of the developed algorithm are investigated. Simulation results indicate that it outperforms the difference- of-two-convex-functions (DC) programming with much less computation time, and its achieved secrecy rate is close to the global optimum solution.
Keywords :
Lyapunov methods; concave programming; convergence of numerical methods; multi-access systems; multiuser channels; optimisation; telecommunication security; Lyapunov drift approach; MAC; convergence condition; difference-of-two-convex-functions programming; dynamic power allocation problem; global optimum solution; multiple-access channel; multiple-access channels; nonconvex optimization problem; secrecy-rate maximization; sub-optimal solution; transmitted power constraints; Communication system security; Dynamic scheduling; Optimization; Programming; Resource management; Simulation; Wireless communication;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2014 IEEE 80th
Conference_Location :
Vancouver, BC
DOI :
10.1109/VTCFall.2014.6965948
