Resource allocation with SIC under statistical CSI in multi-carrier based cognitive radio networks

In this paper, we study the problem of resource allocation for an opportunistic spectrum-sharing channel under the assumption of statistical channel state information (CSI). More specifically, we assume that statistical CSI of the channels between both primary and secondary transmitters and the primary receiver is available at the secondary transmitter. We investigate the achievable rate maximization of both primary and secondary systems with successive interference cancellation (SIC) under outage, interference limit, and total power constraints. We deal with the secondary non-convex optimization problem by using the first order Taylor approximation. We propose a sequential convex approximation algorithm to solve the power allocation problem. Simulation results establish the efficiency of our proposed algorithm.