Capacity Enhancement of D2D Aided Coordinated Direct and Relay Transmission Using NOMA

被引：28

作者：

Zou, Lisha ^{[1
]}

Chen, Jian ^{[1
]}

Lv, Lu ^{[1
,2
]}

He, Bingtao ^{[1
]}

机构：

[1] Xidian Univ, State Key Lab Integrated Serv Networks, Xian 710071, Peoples R China

[2] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2020年 / 24卷 / 10期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

NOMA; Device-to-device communication; Relays; Interference; Closed-form solutions; Resource management; Signal to noise ratio; Ergodic sum capacity; spectral efficiency; non-orthogonal multiple access; device-to-device; coordinated direct and relay transmission; NONORTHOGONAL MULTIPLE-ACCESS;

D O I：

10.1109/LCOMM.2020.3000996

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

This letter investigates a device-to-device (D2D) communication aided coordinated direct and relay transmission (CDRT) using non-orthogonal multiple access (NOMA) framework, where a cell-center user (CU) is served by a base station (BS) directly while a cell-edge user (EU) needs the help of a relaying user (RU) to communicate with BS. Specifically, with the use of the NOMA principle, we propose to exploit a D2D communication link from RU to CU for transmitting a new signal during the information forwarding of RU in the second phase, so as to enhance the network spectrum efficiency. Analytical closed-form expressions of the system ergodic sum capacity are derived and verified by computer simulations. Both analytical and simulation results demonstrate that the D2D aided NOMA scheme achieves higher sum rates than the conventional CDRT scheme and orthogonal multiple access (OMA) scheme.

引用

页码：2128 / 2132

页数：5

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