Sum-Rate Maximization of NOMA Systems Under Imperfect Successive Interference Cancellation

被引：107

作者：

Abu Mahady, Islam ^{[1
]}

Bedeer, Ebrahim ^{[2
]}

Ikki, Salama ^{[1
]}

Yanikomeroglu, Halim ^{[3
]}

机构：

[1] Lakehead Univ, Elect Engn Dept, Thunder Bay, ON P7B 5E1, Canada

[2] Ulster Univ, Sch Engn, Newtownabbey BT37 0QB, North Ireland

[3] Carleton Univ, Dept Syst & Comp Engn, Ottawa, ON K1S 5B6, Canada

来源：

IEEE COMMUNICATIONS LETTERS | 2019年 / 23卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Improper Gaussian signaling; non-linear optimization; NOMA; sum-rate; imperfect successive interference cancellation;

D O I：

10.1109/LCOMM.2019.2893195

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

This letter addresses the sum-rate maximization for a downlink non-orthogonal multiple access (NOMA) system in the presence of imperfect successive interference cancellation (SIC). We assume that the NOMA users adopt improper Gaussian signaling (IGS), and hence derive new expressions of their rates under residual interference from imperfect SIC. We optimize the circularity coefficient of the IGS-based NOMA system to maximize its sum-rate subject to quality-of-service requirements. Compared to the NOMA with proper Gaussian signaling, simulation results show that the IGS-based NOMA system demonstrates considerable sum-rate performance gain under imperfect SIC.

引用

页码：474 / 477

页数：4

共 9 条

[1] Overlay Spectrum Sharing Using Improper Gaussian Signaling [J].