다중-셀 네트워크를 위한 비-직교 다중접속의 전력최적화

Abstract

Non-orthogonal multiple access (NOMA) is thought of as a challenging technique for providing the data rate and spectral efficiency requirement in the era of future wireless communication. This article studies the performance of a NOMA adopted two-cell downlink communication scenario where adjacent cells interfere into each other’s data transmission and each cell consists of two users. Then, the optimization problem with respect to power allocation between NOMA users is formulated. This optimization problem aims at maximizing the throughput of the system under two constraints. First, it considers a total transmit power constraint for distributing power among NOMA user devices. Second, it regards a quality-of-service demand constraint to meet minimum data rate requirements of the users. Two different closed-form solutions are derived based on the proposed optimization problem. The superiority of the proposed power allocation scheme is proved through simulation results.