Pairing Distance Resolution and Power Control for Massive Connectivity Improvement in NOMA Systems

Mounchili, Salifou; Hamouda, Soumaya

doi:10.1109/tvt.2020.2975539

Cited by 60 publications

(15 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This enables better connectivity of the paired NoUEs of NOMA. S. Mounchili et al proposed a new NOMA user pairing program based on the user's distance [17]. Also, a common energy allocation strategy was subsequently proposed, which takes the conditions of its user channel into account.…”

Section: Related Workmentioning

confidence: 99%

“…When two users are paired by pairing methods in [20]. In NOMA system, the Superposition Coding (SC) is deployed at the transmitter and the Successive Interference Cancellation (SIC) is performed at the receiver [17], [21], [22], [23], [6]. NOMA techniques can mainly be divided into two categories, namely, code-domain NOMA and power-domain PD-NOMA [21].…”

Section: Nomamentioning

confidence: 99%

See 1 more Smart Citation

Doppler Shift Effect with Non-Orthogonal Multiple Access Technology for 5G System

Hussein¹,

Ayoob²

2022

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9

View full text Add to dashboard Cite

Non-orthogonal Multiple access (NOMA) is a 5G wireless connectivity technology. It aims to improve user (UE) service at cell edge (CE) by pairing with the UE at cell center (CC). User velocity is an important component of 5G communication systems. This paper investigates the presence of a Doppler shift effect (DSE) for the movement of a user in NOMA cell. Also, the emphasis in this search is on DSE for users (UEs) at the CC and on the user's velocity at 180km/h. The method used for the simulation, Link (LL) Level emulator for Vienna 5G. Through the NOMA principle, the results demonstrate that DSE was evident on the UE in center of the cellular network. When changing user's speed from 0 to 180 km/h, the user's efficiency changed from 4.937 Mbit/s to 0.6418 Mbit/s at transmitted Power of eNB equal 25dBm. In other expression, due to an increase in the UE's speed and DSE, the user's throughput decreases by nine times his efficiency at speed = 0 km / h. By increasing number of eNB antennas, MIMO (8X2) has achieved 4 times better user efficiency improvement than MIMO (2X2). The number of UE antennas is increased antennas to four and changing number of eNB antennas, MIMO (2X4) enables to maintain user's throughput at high speed and DSE. In this type of MIMO, the user's efficiency has reached a result close to that of UE when his motion is stationary.

show abstract

Section: Related Workmentioning

confidence: 99%

Section: Nomamentioning

confidence: 99%

Doppler Shift Effect with Non-Orthogonal Multiple Access Technology for 5G System

Hussein¹,

Ayoob²

2022

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9

View full text Add to dashboard Cite

show abstract

“…In [19], a dynamic user grouping strategy is proposed, based on the underlying Rayleigh faded channel coefficients, and to increase the detection accuracy at the receiver end by maintaining a minimum interference between the users that share the same subcarrier. The authors in [8] uses an adaptive user pairing methodology to identify a user far from the access point (AP) and then select a user with a better channel condition to group them on a same subcarrier. Recently, the use of machine learning (ML) based clustering algorithms are used to intelligently perform the user grouping for NOMA systems by identifying an appropriate number of clusters [9].…”

Section: A Existing Workmentioning

confidence: 99%

Unsupervised Learning Based Emission-Aware Uplink Resource Allocation Scheme for Non-Orthogonal Multiple Access Systems

Jamshed

Héliot

Brown

2021

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

The densification of wireless infrastructure to meet ever-increasing quality of service (QoS) demands, and the evergrowing number of wireless devices may lead to higher levels of electromagnetic field (EMF) exposure in the environment, in the 5G era. The possible long term health effects related to the EMF radiation are still an open debate and requires attention. Therefore, in this paper, we propose a novel EMFaware resource allocation scheme based on the power domain non-orthogonal multiple access (PD-NOMA) and machine learning (ML) technologies for reducing the EMF exposure in the uplink of cellular systems. More specifically, we use the K-means approach (an unsupervised ML approach) to create clusters of users to be allocated together and to then strategically group and assign them on the subcarriers, based on their associated channel properties. Finding the best number of clusters in the PD-NOMA environment is a key challenge, and in this paper, we have used the elbow method in conjunction with the F-test method to effectively control the maximum number of users to be allocated at the same time per subcarrier. We have also derived an EMF-aware power allocation by formulating and solving a convex optimization problem. Based on the simulation results, our proposed ML-based strategy effectively reduces the EMF exposure, in comparison with the state-of-the-art techniques.

show abstract

“…In previous studies, the solutions proposed in NOMA networks are all designed according to the distance between the user and the base station [12,13]. If the users with small channel gain differences are paired with each other, the performance of successive interference cancellation (SIC) will be degraded, and accordingly, the capacity of these users will be reduced [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

User pairing using laser chaos decision maker for NOMA systems

Duan

Okada

et al. 2022

NOLTA

View full text Add to dashboard Cite

Non-Orthogonal Multiple Access is one of the most important technologies in 5G and Beyond 5G wireless communications, which improve system performance by power domain multiplexing. In realizing Non-Orthogonal Multiple Access, the pairing of multiple users is necessary where efficient principles are highly demanded in dynamically changing electromagnetic environments. In the meantime, ultrafast methods of solving multi-armed bandit problems have been developed using chaotic laser time series. In this paper, we consider the user pairing problem in Non-Orthogonal Multiple Access as a multi-armed bandit problem and propose an ultra-fast user pairing algorithm based on the laser chaos decision maker. We numerically demonstrate that the proposed scheme accomplishes higher throughputs compared with traditional user pairing algorithms, especially in cases with lower user density.

show abstract

Pairing Distance Resolution and Power Control for Massive Connectivity Improvement in NOMA Systems

Cited by 60 publications

References 25 publications

Doppler Shift Effect with Non-Orthogonal Multiple Access Technology for 5G System

Doppler Shift Effect with Non-Orthogonal Multiple Access Technology for 5G System

Unsupervised Learning Based Emission-Aware Uplink Resource Allocation Scheme for Non-Orthogonal Multiple Access Systems

User pairing using laser chaos decision maker for NOMA systems

Contact Info

Product

Resources

About