New User Grouping Scheme for Better User Pairing in NOMA Systems

Mounchili, Salifou; Hamouda, Soumaya

doi:10.1109/iwcmc48107.2020.9148054

Cited by 26 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further, to improve the sum rate of user pairs with small channel gain differences, a distributed NOMA (D-NOMA) user pairing scheme has been discussed by Mounchili and Hamouda. 17 It is applicable with the assumption of equal number of weak and strong users, and intergroup space is introduced in pairing all the users. The issue of pairing of cell center (high-quality channel), cell mid (medium-quality channel), and cell edge (low-quality channel) users has been discussed by Shahab et al 18 In this context, uniform channel gain difference (UCGD) pairing scheme has been proposed in which cell mid and cell center users are paired together instead of pairing cell center and cell edge users.…”

Section: Related Workmentioning

confidence: 99%

“…The main advantage of D‐NLUPA scheme is that it introduces the concept of cluster fairness. Further, to improve the sum rate of user pairs with small channel gain differences, a distributed NOMA (D‐NOMA) user pairing scheme has been discussed by Mounchili and Hamouda 17 . It is applicable with the assumption of equal number of weak and strong users, and intergroup space is introduced in pairing all the users.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A clustering‐based user pairing scheme for downlink 3D non‐orthogonal multiple access‐based visible light communication systems

Dogra,

Rai Bharti

2024

Int J Communication

View full text Add to dashboard Cite

SummaryNon‐orthogonal multiple access (NOMA) has proven to be a very effective multiple access scheme to be employed in visible light communication (VLC) systems. NOMA scheme is capable of enhancing the spectral efficiency, sum rate performance, and various other performance parameters in VLC systems as compared to traditional orthogonal multiple access schemes. However, it is not practical to apply the concept of NOMA to all the users jointly. Therefore, the concept of user pairing has been introduced in literature to implement NOMA effectively so as to reduce the decoding order of successive interference cancellation (SIC) mechanism and complexity. In this paper, we have proposed a user pairing scheme based on clustering for downlink 3D NOMA‐based VLC systems. In this user pairing scheme, clustering is performed prior user pairing. The number of clusters are selected using K‐means algorithm and Elbow method, and the user allocation in a particular cluster is validated using artificial bee colony (ABC) optimization. In order to achieve high throughput, inter‐cluster user pairing is performed by forming pairs of two or three users with maximum channel gain difference in between them. The simulation results show that, for given values of signal‐to‐noise ratio (SNR), the proposed user pairing scheme offers higher average user data rates (AUDRs) as compared to the existing user pairing schemes for downlink NOMA‐based VLC systems. The energy efficiency (EE) and the bit error rate (BER) performance of the proposed user pairing scheme have also been studied.

show abstract

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A clustering‐based user pairing scheme for downlink 3D non‐orthogonal multiple access‐based visible light communication systems

Dogra,

Rai Bharti

2024

Int J Communication

View full text Add to dashboard Cite

show abstract

“…where the chosen value of 𝛼 P in (15) refers to satisfying the SINR of the PU in a pair should be equal to or greater than the term on the left of the (15). After obtaining 𝛼 P , 𝛼 S represents the rest of the total power, that is, 𝛼 S = 1 − 𝛼 P , which is given to the SU at that pair.…”

Section: 3mentioning

confidence: 99%

“…Additionally, it shields them from the issue of zero channel gain difference and enables users of a specific NOMA set to achieve various throughputs more equitably. 15 A new transmit-zero-forcing beamforming (ZFBF) technique with signal alignment is suggested to enhance the physical layer security (PLS) to secure the communications in a multi-cell MIMO-NOMA based CRN system. This technique analyzes secrecy capacity and secrecy outage probability.…”

Section: Introductionmentioning

confidence: 99%

Algorithms and throughput analysis of cognitive radio‐based MIMO‐NOMA for the next generation of wireless communications

Saeed,

Ahmed

2024

Trans Emerging Tel Tech

View full text Add to dashboard Cite

In this paper, multi‐users (MU) communications are considered based on the cognitive ratio (CR) technique. Multiple‐input multiple‐output (MIMO) and non‐orthogonal multiple access (NOMA) are proposed to be merged with CR for the sake of improving the achievable throughput and satisfying user fairness. Moreover, utilizing MIMO‐NOMA enables the CR users to be served in the coverage network without the need for spectral sensing. Three scenarios are assumed in this paper to investigate the performance of each CR secondary user (SU) in the presence of single or multiple primary users (PUs). Pairing algorithms are proposed and applied to obtain optimum throughputs and outage probabilities, in which the algorithms are employed to select a PU with an SU to be coupled in a pair, depending on allocating the required power for each user, taking into account that any PU has the priority to reach its required throughput. Moreover, mathematical expressions have been derived for each case to evaluate the required power allocation factor and the achievable throughput for each user. Furthermore, the proposed algorithms show successful and satisfactory achievable rates and outage probabilities.

show abstract

“…Theoretical analysis and simulation show that the algorithm has a lower interruption probability and higher sum rate. Mounchili and Hamouda [20] recommend a user pairing algorithm to ensure an optimal sum rate between NOMA clusters and improve performance with minimal gain differences. Salehi et al [21] establish a collaborative NOMA (C-NOMA) system that allocates resources to maximize efficiency by using a user pairing scheme.…”

Section: Advances In Noma Nodementioning

confidence: 99%

MMW-NOMA: An Uplink NOMA Communication System Based on the Node Pairing Algorithm of Maximum and Minimum Weight in Underwater Acoustic Networks

Gao

Wang

Chen

et al. 2022

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

In orthogonal multiple access (OMA) communication systems, resources are allocated to numerous users based on time, frequency, or code domains. The low bandwidth of the underwater acoustic network limits the number of nodes that can be supported by the OMA system, due to limited resources. The innovative concept of nonorthogonal multiple access (NOMA) provides a solution that offers more nodes and increases spectral efficiency. As a promising technique, it optimizes power allocation through channel characteristics and adopts serial interference cancellation algorithms to decode the signal at the receiver. This paper introduces an underwater communication system based on the node pairing algorithm of maximum and minimum weight (MMW-NOMA). First, we build the system model in a UAN scenario. Second, we present the node pairing strategy. Third, we design a node replacement mechanism. Furthermore, we offer a power allocation algorithm. Finally, we compare the performance of MMW-NOMA with randomly paired NOMA (RP-NOMA) and orthogonal frequency division multiplexing (OFDM). Numerical results show that MMW-NOMA outperforms RP-NOMA and OFDM in throughput, mean square error, and energy efficiency. However, the complexity of MMW-NOMA is slightly higher than that of RP-NOMA but significantly lower than OFDM. These results show that MMW-NOMA achieves a reasonable trade-off between performance and complexity.

show abstract

New User Grouping Scheme for Better User Pairing in NOMA Systems

Cited by 26 publications

References 11 publications

A clustering‐based user pairing scheme for downlink 3D non‐orthogonal multiple access‐based visible light communication systems

A clustering‐based user pairing scheme for downlink 3D non‐orthogonal multiple access‐based visible light communication systems

Algorithms and throughput analysis of cognitive radio‐based MIMO‐NOMA for the next generation of wireless communications

MMW-NOMA: An Uplink NOMA Communication System Based on the Node Pairing Algorithm of Maximum and Minimum Weight in Underwater Acoustic Networks

Contact Info

Product

Resources

About