scholarly journals Code Domain Non- Orthogonal Multiple Access Schemes for 5G and Beyond Communication Networks: A Review

2021 ◽  
Author(s):  
Aasheesh Shukla ◽  
◽  
Manish Kumar ◽  
Vinay Kumar Deolia ◽  
◽  
...  
Keyword(s):  
Communication Networks ◽  
Multiple Access ◽  
Heterogeneous Data ◽  
Data Traffic ◽  
5G Networks ◽  
Comprehensive Overview ◽  
Power Domain ◽  
Rate Splitting ◽  
Code Domain ◽  
Multiple Access Schemes

Future communication networks may encounter various issues in order to facilitate heavy heterogeneous data traffic and large number of users, therefore more advanced multiple access (MA) schemes are being developed to meet the changing requirements. The research space on making more robust MA scheme is continuously increasing, so it becomes significant to analyze the various schemes to determine the appropriate MA scheme for 5G networks. Therefore, in this paper the comprehensive overview of the most popular and recent MA schemes is presented for 5G networks. This paper mainly classifies the MA techniques in orthogonal MA (OMA) and various types of non-OMA (NOMA) techniques. Specifically, we introduce RSMA (Rate splitting multiple access) and IDMA (interleave division multiple access). Further the close attention is paid to NOMA family, including code-domain NOMA (e.g., SCMA (sparse code multiple access)), power-domain NOMA. Above all, from this exploration, the opportunities and challenges could be notified in MA schemes and further the optimum MA technique can be point out among discussed MA schemes for 5G and beyond communication networks.

scholarly journals MULTIPLE ACCESS TECHNIQUES FOR 5G NETWORKS

2020 ◽  
Vol 5 (2) ◽  
pp. 305-314
Author(s):  
Mrs. Rinkoo Bhatia
Keyword(s):  
Multiple Access ◽  
Heterogeneous Traffic ◽  
5G Networks ◽  
Comprehensive Overview ◽  
Fifth Generation ◽  
Power Domain ◽  
Different Types ◽  
Code Domain ◽  
Multiple Access Schemes ◽  
Multiple Domains

Fifth generation (5G) wireless networks face various challenges in order to support largescale heterogeneous traffic and users, therefore new modulation and multiple access (MA) schemes are being developed to meet the changing demands. As this research space is ever increasing, it becomes more important to analyze the various approaches, therefore, in this article we present a comprehensive overview of the most promising Multiple Access schemes for 5G networks. Our article focuses on various types of non-orthogonal multiple access (NOMA) techniques. Specifically, we first introduce different types of modulation schemes, potential for OMA. We then pay close attention to various types of NOMA candidates, including power-domain NOMA, code-domain NOMA, and NOMA multiplexing in multiple domains. From this exploration, we can identify the opportunities and challenges that will have the most significant impacts on modulation and MA designs for 5G networks.

scholarly journals Joint RSMA and IDMA-Based NOMA system for downlink Communication in 5G and Beyond Networks

2020 ◽  
Vol 16 (4) ◽  
pp. 324-329
Author(s):  
Aasheesh Shukla
Keyword(s):  
Communication Networks ◽  
Multiple Access ◽  
Heterogeneous Data ◽  
Broadcast Channels ◽  
Data Traffic ◽  
Access Scheme ◽  
Wide Range ◽  
Rate Splitting ◽  
Code Domain ◽  
Weighted Sum Rate

Future communication networks may encounter various issues in order to facilitate heavy heterogeneous data traffic and large number of users, therefore more advanced multiple access (MA) schemes is required to meet the changing requirements. Recently, a promising physical-layer MA technique has been suggested for multi-antenna broadcast channels, namely Rate Splitting Multiple Access (RSMA). This new scheme has the ability to partially decode the interference and partially treat the remaining interference as noise which makes it to cope with wide range of user deployments and network loads. On the other hand, interleave division multiple access (IDMA) has already been recognized as a potential code domain NOMA (non-orthogonal multiple access) scheme, suitable for 5G and beyond communication network. Hence, in this paper, a new approach of multiple access scheme is proposed to get the grip on new challenges in future communication (6G). The proposed framework consists the joint processing of RSMA and IDMA (code domain NOMA), in which the transmitter involves an IDMA as encoder and allows rate splitting to split the message in two parts i.e. common part and private part, before the actual transmission. The mathematical modeling of proposed system is elaborated in the paper and for simulation purpose the downlink communication scenario has been considered where users faced diverse channel conditions. The weighted sum rate (WSR) performance is evaluated for the proposed scheme which validate the quality of service (QoS) of the joint RS-IDMA system.

scholarly journals Evaluation of Non-Orthogonal Techniques for Advance Wireless System

2019 ◽  
Vol 8 (2) ◽  
pp. 1849-1854
Keyword(s):  
Multiple Access ◽  
Heterogeneous Data ◽  
Bandwidth Efficiency ◽  
Data Traffic ◽  
Cellular Radio ◽  
Wireless System ◽  
Basic Principles ◽  
Radio System ◽  
Power Domain ◽  
Detailed Outline

This article represents a comparative study of various types of multiple users’ access schemes for cellular radio system. One of the promising technique for the significant bandwidth efficiency enhancement in future wireless cellular system compared to the conventional multiple access technologies, especially orthogonal multiple access is Non-Orthogonal multiple access(NOMA). NOMA have grater spectral efficiency and more massive connectivity over orthogonal in fading environment. Third generation partnership projects have recently been proposed NOMA for 4G (3GPP-LTE-A). It is a Novel technique focusing the solution for 5G, advanced multimedia applications and Internet of things in terms of supporting massive heterogeneous data traffic. This review paper primarily focus on diverse NOMA techniques and provides a detailed outline of the Cutting edge in NOMA basic principles, NOMA power domain and its other variants.

A Review of Power Domain Non-Orthogonal Multiple Access in 5G Networks

2018 ◽  
Vol 10 (7) ◽  
Author(s):  
Aiman Kassir ◽  
◽  
Rudzidatul Akmam Dziyauddin ◽  
Hazilah Mad Kaidi ◽  
Mohd Azri Mohd Izhar ◽  
...  
Keyword(s):  
Multiple Access ◽  
5G Networks ◽  
Power Domain

A survey and taxonomy on nonorthogonal multiple-access schemes for 5G networks

2017 ◽  
Vol 29 (1) ◽  
pp. e3202 ◽  
Author(s):  
Mehak Basharat ◽  
Waleed Ejaz ◽  
Muhammad Naeem ◽  
Asad Masood Khattak ◽  
Alagan Anpalagan
Keyword(s):  
Multiple Access ◽  
5G Networks ◽  
Multiple Access Schemes

scholarly journals The Application of Power-Domain Non-Orthogonal Multiple Access in Satellite Communication Networks

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 63531-63539 ◽  
Author(s):  
Xiaojuan Yan ◽  
Kang An ◽  
Tao Liang ◽  
Gan Zheng ◽  
Zhiguo Ding ◽  
...  
Keyword(s):  
Communication Networks ◽  
Multiple Access ◽  
Satellite Communication ◽  
Power Domain

scholarly journals NOMA for Multinumerology OFDM Systems

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Ayman T. Abusabah ◽  
Huseyin Arslan
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Multiple Access ◽  
Frequency Division ◽  
Ofdm Systems ◽  
Superposition Coding ◽  
Promising Technique ◽  
Successive Interference Cancelation ◽  
Power Domain ◽  
Multiple Access Schemes ◽  
Spectrally Efficient

Nonorthogonal multiple access (NOMA) is a promising technique which outperforms the traditional multiple access schemes in many aspects. It uses superposition coding (SC) to share the available resources among the users and adopts successive interference cancelation (SIC) for multiuser detection (MUD). Detection is performed in power domain where fairness can be supported through appropriate power allocation. Since power domain NOMA utilizes SC at the transmitter and SIC at the receiver, users cannot achieve equal rates and experience higher interference. In this paper, a novel NOMA scheme is proposed for multinumerology orthogonal frequency division multiplexing system, that is, different subcarrier spacings. The scheme uses the nature of mixed numerology systems to reduce the constraints associated with the MUD operation. This scheme not only enhances the fairness among the users but improves the bit error rate performance as well. Although the proposed scheme is less spectrally efficient than conventional NOMA schemes, it is still more spectrally efficient than orthogonal multiple access schemes.

scholarly journals Intelligent reflected surfaces assisted code domain non-orthogonal multiple access scheme

2021 ◽  
Vol 72 (5) ◽  
pp. 343-347
Author(s):  
Aasheesh Shukla
Keyword(s):  
Communication Networks ◽  
Information Transfer ◽  
Multiple Access ◽  
Wireless Communication Networks ◽  
Radio Waves ◽  
Reflection And Refraction ◽  
Access Scheme ◽  
Code Domain ◽  
Efficient Code ◽  
Phase Amplitude

Abstract The propagation medium plays a crucial role in any wireless communication networks, the channel between the transmitter and the receiver, deteriorate the quality of the received signal due to the uncontrollable interactions such as scattering, reflection, and refraction in the channel with the surrounding objects. To overcome this challenge, the recent advent of recongurable intelligent surfaces can be helpful, in which the network operators can control the radio waves, eg, the phase, amplitude, frequency, and even polarization, of the impinging signals without the need of complex decoding, encoding, and radio frequency processing operations. On the other hand, few research papers reported an efficient code domain non orthogonal multiple access (NOMA) such as Interleave division multiple access (IDMA) system for wireless information transfer. Persuaded by the capability of this arising RIS technology, the present article is aimed to provide the modified framework of IDMA (code-domain NOMA) communication system based on RIS technology. Simulation results demonstrate that the proposed system achieves better SNR performance than the conventional IDMA framework.

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