Resource Allocation in SCMA-based System

In this paper, downlink resource allocation for a sparse code multiple access (SCMA) based heterogeneous  cellular networks (HCN) is investigated. The main aim of this paper is to obtain joint power allocation and codebook assignment to achieve the least total system transmit power. In this regard, the proposed objective function is formulated as total transmit power subject to users minimum rate requirement, total available power in each base station (BS), and SCMA constraint. To solve the proposed problem an iterative algorithm considering successive convex approximation (SCA) is applied. Also,convergence of the iterative method is investigated. In the simulation results the effectiveness of proposed resource allocation method are shown.

کلیدواژه ها:

Index Terms– SCMA ، resource allocation ، energy effi-ciency ، successive convex approximation (SCA)