On secure system performance over SISO, MISO and MIMO-NOMA wireless networks equipped a multiple antenna based on TAS protocol

Thanh-Nam Tran,Miroslav Voznak

doi:10.1186/s13638-019-1586-y

Thanh-Nam Tran, Miroslav Voznak

Open Access

https://doi.org/10.1186/s13638-019-1586-y

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Abstract

This study examined how to improve system performance by equipping multiple antennae at a base station (BS) and all terminal users/mobile devices instead of a single antenna as in previous studies. Experimental investigations based on three NOMA down-link models involved (1) a single-input-single-output (SISO) scenario in which a single antenna was equipped at a BS and for all users, (2) a multi-input-single-output (MISO) scenario in which multiple transmitter antennae were equipped at a BS and a single receiver antenna for all users and (3) a multi-input-multi-output (MIMO) scenario in which multiple transmitter antennae were equipped at a BS and multiple receiver antenna for all users. This study investigated and compared the outage probability (OP) and system throughput assuming all users were over Rayleigh fading channels. The individual scenarios also each had an eavesdropper. Secure system performance of the individual scenarios was therefore also investigated. In order to detect data from superimposed signals, successive interference cancellation (SIC) was deployed for users, taking into account perfect, imperfect and fully imperfect SICs. The results of analysis of users in these three scenarios were obtained in an approximate closed form by using the Gaussian-Chebyshev quadrature method. However, the clearly and accurately presented results obtained using Monte Carlo simulations prove and verify that the MIMO-NOMA scenario equipped with multiple antennae significantly improved system performance.

Highlights

The explosive growth of mobile devices and the Internet of Things (IoT) is facing a trend of increased wireless network traffic in future networks
This paper investigated and compared the system performance in different scenarios of SISO, MIMO scenario are given as follows: (MISO) and MIMO architecture with deploying Transmitter antenna selection (TAS) protocol in order to determine which had the best quality of service (QoS) for users
From the analysis and simulation results obtained in the previous subsection 4.1, we observed that fully imperfect successive interference cancellation (SIC) showed a balanced QoS between U2 and U1

Summary

Introduction

The explosive growth of mobile devices and the Internet of Things (IoT) is facing a trend of increased wireless network traffic in future networks. Researchers have confirmed non-orthogonal multiple access (NOMA) as the candidate to become the fifth generation (5G) wireless communication technology [1,2,3,4]. Liu et al [5] demonstrated that the NOMA system has a better ergodic sum rate (ESR) than the orthogonal multiple access (OMA) system. In order to improve system performance, researchers have proposed many different technologies. In accordance with capability and reality, some wireless technologies combined with NOMA were proposed in order to scale up system performance: cooperative communication [15, 16], full duplex [17], cognitive radio (CR) [18, 19], millimetre wave [20], visible light communication [21], etc

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