Distributed Downlink Power Control for the MISO-NOMA System with Two Interfering Cells
03 June 2018
This paper investigates the power control problem for the downlink of a multiple-input single-output non-orthogonal multiple access (MISO-NOMA) system with two interfering cells. The problem aims at minimizing the total power of the base stations (BS) subject to the data rate requirements of the users. A distributed power control algorithm is designed. During each iteration, the BS updates the transmit power of its attached users according to the link gain and the interference plus noise power at the associated users. For some special cases, we show that the algorithm is guaranteed to converge to the optimal solution based on Yate's power control framework. Simulation results quantify significant improvement of the proposed power control algorithm over orthogonal multiple access (OMA) counterpart.
