Dynamic Resource Allocation for Transmit Power Minimization in OFDM-Based NOMA Systems

被引：86

作者：

Li, Xunan ^{[1
]}

Li, Chong ^{[2
]}

Jin, Ye ^{[1
]}

机构：

[1] Peking Univ, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China

[2] Qualcomm Res, Bridgewater, NJ 08807 USA

来源：

IEEE COMMUNICATIONS LETTERS | 2016年 / 20卷 / 12期

关键词：

Resource allocation; OFDM; NOMA; QoS; power minimization;

D O I：

10.1109/LCOMM.2016.2612688

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

In this letter, resource allocation in a downlink orthogonal frequency division multiplexing (OFDM)-based non-orthogonal multiple access (NOMA) system is studied. We investigate an optimization problem of minimizing the total transmit power under quality of service requirements, by jointly searching for optimal subcarrier assignments of each user and power allocations over subcarriers. We first present an optimal solution of power allocation with fixed subcarrier assignments, based on which we next propose a low-complexity algorithm of jointly optimizing the subcarrier assignments and power allocations. Numerical results show that the performance of the proposed algorithm is near-optimal and the power consumption is significantly reduced compared with both the conventional OFDM-based frequency division multiple access and the static NOMA resource allocation schemes.

引用

页码：2558 / 2561

页数：4

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