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

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 relayi...

Full description

Saved in:
Bibliographic Details
Published in:IEEE communications letters 2020-10, Vol.24 (10), p.2128-2132
Main Authors: Zou, Lisha, Chen, Jian, Lv, Lu, He, Bingtao
Format: Article
Language:English
Subjects:
Closed-form solutions
coordinated direct and relay transmission
device-to-device
Device-to-device communication
Ergodic sum capacity
Interference
Mathematical analysis
NOMA
non-orthogonal multiple access
Nonorthogonal multiple access
Relay
Relaying
Relays
Resource management
Signal to noise ratio
spectral efficiency
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2020.3000996