Multi-user detection for the downlink of NOMA systems with multi-antenna schemes and power-efficient amplifiers

Abstract

Non-orthogonal multiple access (NOMA) schemes have been recognized as a promising multiple access method for the fifth generation (5G) communication systems. In NOMA, multiple users can share the same physical channel, which allows for a substantial increase in capacity gains when comparing to conventional orthogonal multiple access (OMA) techniques. This paper considers the downlink transmission of NOMA schemes combined with single-carrier (SC) signals. We present a multi-antenna transmission technique that is compatible with highly efficient power amplifiers without requiring any pre-processing. Furthermore, a multi-user detection scheme based on iterative frequency-domain equalization (FDE) is presented. We show that besides the high power-efficiency of the transmission scheme, the system's performance can be close to the matched filter bound (MFB).

Original language	English
Pages (from-to)	199-205
Number of pages	7
Journal	Physical Communication
Volume	33
DOIs	https://doi.org/10.1016/j.phycom.2019.01.003
Publication status	Published - 1 Apr 2019

Keywords

Efficient power amplification
Iterative frequency-domain detection
Multi-antenna systems
NOMA
SC-FDE

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1016/j.phycom.2019.01.003

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@article{6338a3f959114341a0a5ed571b080802,

title = "Multi-user detection for the downlink of NOMA systems with multi-antenna schemes and power-efficient amplifiers",

abstract = "Non-orthogonal multiple access (NOMA) schemes have been recognized as a promising multiple access method for the fifth generation (5G) communication systems. In NOMA, multiple users can share the same physical channel, which allows for a substantial increase in capacity gains when comparing to conventional orthogonal multiple access (OMA) techniques. This paper considers the downlink transmission of NOMA schemes combined with single-carrier (SC) signals. We present a multi-antenna transmission technique that is compatible with highly efficient power amplifiers without requiring any pre-processing. Furthermore, a multi-user detection scheme based on iterative frequency-domain equalization (FDE) is presented. We show that besides the high power-efficiency of the transmission scheme, the system's performance can be close to the matched filter bound (MFB).",

keywords = "Efficient power amplification, Iterative frequency-domain detection, Multi-antenna systems, NOMA, SC-FDE",

author = "Ribeiro, {Filipe Casal} and Jo{\~a}o Guerreiro and Rui Dinis and Francisco Cercas and Jayakody, {Dushantha Nalin K.}",

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AU - Ribeiro, Filipe Casal

AU - Guerreiro, João

AU - Dinis, Rui

AU - Cercas, Francisco

AU - Jayakody, Dushantha Nalin K.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - Non-orthogonal multiple access (NOMA) schemes have been recognized as a promising multiple access method for the fifth generation (5G) communication systems. In NOMA, multiple users can share the same physical channel, which allows for a substantial increase in capacity gains when comparing to conventional orthogonal multiple access (OMA) techniques. This paper considers the downlink transmission of NOMA schemes combined with single-carrier (SC) signals. We present a multi-antenna transmission technique that is compatible with highly efficient power amplifiers without requiring any pre-processing. Furthermore, a multi-user detection scheme based on iterative frequency-domain equalization (FDE) is presented. We show that besides the high power-efficiency of the transmission scheme, the system's performance can be close to the matched filter bound (MFB).

AB - Non-orthogonal multiple access (NOMA) schemes have been recognized as a promising multiple access method for the fifth generation (5G) communication systems. In NOMA, multiple users can share the same physical channel, which allows for a substantial increase in capacity gains when comparing to conventional orthogonal multiple access (OMA) techniques. This paper considers the downlink transmission of NOMA schemes combined with single-carrier (SC) signals. We present a multi-antenna transmission technique that is compatible with highly efficient power amplifiers without requiring any pre-processing. Furthermore, a multi-user detection scheme based on iterative frequency-domain equalization (FDE) is presented. We show that besides the high power-efficiency of the transmission scheme, the system's performance can be close to the matched filter bound (MFB).

KW - Efficient power amplification

KW - Iterative frequency-domain detection

KW - Multi-antenna systems

KW - NOMA

KW - SC-FDE

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