Robust Secure Resource Allocation Algorithm for Heterogeneous Networks with Hardware Impairments br

To solve the problems of signal distortion at the transceivers, information leakage and transmissioninterruption of users in multi-cell multi-user heterogeneous networks, a robust secure resource allocationalgorithm is proposed with distortion noises. Considering the constraints of the minimum secure rate of eachsmall-cell user, the maximum transmit power of each base station and the cross-tier interference power of eachmacro-cell user, an energy efficiency maximization-based resource allocation model is formulated under boundedchannel uncertainties. The original non-convex optimization problem is converted into an equivalent convex oneby using the Dinkelbach's method, the worst-case method and the successive convex approximation method.And the analytical solution is obtained by using Lagrangian dual function method. Simulation resultsdemonstrate that the proposed algorithm has better energy efficiency and robustness by comparing it with the existing algorithms