Performance Analysis of Selective DF Cooperative NOMA in Presence of Practical Impairments

Soni, Sandhya; Makkar, Rahul; Rawal, Divyang; Sharma, Nikhil

doi:10.1109/jsyst.2023.3246996

Cited by 9 publications

(2 citation statements)

References 42 publications

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“…By substituting probability expressions obtained in ( 15) and ( 18) in (17), we get the overall outage at 𝑈 𝑓 .…”

Section: Overall Outage Probability Of Crs-dlnomamentioning

confidence: 99%

“…The results show maximum throughput is attained by adjusting the relay and source power. A virtual MIMO-based CNOMA system is investigated in [17], and overall error performance is evaluated by considering imperfect SIC and CEE scenarios. In this system, the selective relay method is utilized to achieve the diversity benefit at the receiver.…”

Section: Introductionmentioning

confidence: 99%

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Throughput performance optimization of NOMA-assisted cooperative relay system with realistic impairments

Bachan,

Shukla,

Bansal

2023

Journal of Electrical Engineering

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This work aims to investigate the outage and throughput performance of non-orthogonal multiple access assisted cooperative relay system (CRS-NOMA) considering the realistic impairments caused due to in-phase and quadrature-phase imbalance (IQI), channel estimation errors (CEE), and successive interference cancellation (SIC) errors. More specifically, we investigate a model in which two-phase downlink transmission is carried out in two different modes: (i) CRS-NOMA without direct links and (ii) CRS-NOMA with direct links (CRS-DLNOMA). In CRS-NOMA mode, the source broadcasts a composite NOMA signal to destination users with the assistance of a decode-and-forward (DF) relay. In contrast, in CRS-DLNOMA, direct and cooperative links are available for transmission. We derive the analytical expressions of outage probability and throughput for both the NOMA destinations to evaluate the system performance of both CRS-NOMA and CRS-DLNOMA modes of transmission. Furthermore, numerical simulations also study and validate the influence of IQI, CEE, and SIC errors on the outage and throughput performance. The simulation results verify that realistic impairments degrade the system performance, but the presence of direct link has a positive impact on outage and throughput. Additionally, we use the golden search method to optimize the power allocation factor (PAF) and transmission rate to maximize the throughput at the near user while ensuring the throughput constraint at the far user.

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“…By substituting probability expressions obtained in ( 15) and ( 18) in (17), we get the overall outage at 𝑈 𝑓 .…”

Section: Overall Outage Probability Of Crs-dlnomamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Throughput performance optimization of NOMA-assisted cooperative relay system with realistic impairments

Bachan,

Shukla,

Bansal

2023

Journal of Electrical Engineering

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Sum-rate maximization for a distributed space-time block code-aided cooperative NOMA with energy harvesting

Alamu,

Olwal,

Djouani

2024

Wireless Netw

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In this paper, we exploit the spatial and transmission diversities in cooperative non-orthogonal multiple access (C-NOMA) networks to improve the system sum-rate. To achieve this, we propose a user-pairing scheme where near-field user pairs serve as relays for user pairs in the far-field region. Based on this pairing scheme, we incorporate a space-time block code transmission technique at the near-field user pairs to maximize the transmission diversity in the cooperative phase. Moreover, we consider a non-linear energy harvesting model at the near-field user pair to alleviate the problem of energy consumption during the cooperative transmission phase. Further to this, we formulate a sum-rate maximization problem that is addressed from the viewpoint of joint power allocation factor and power splitting ratio optimization. We develop a low-computational iterative algorithm based on the concepts of the Stackelberg game and the Nash bargaining solution. We benchmark our findings with different scenarios, such as energy harvesting C-NOMA with a fixed power allocation factor and power splitting ratio, energy harvesting C-NOMA without STBC, non-cooperative NOMA, and orthogonal multiple access. The results obtained via simulations outperform the benchmark schemes.

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Scaled Selection Combining Receiver for Cooperative NOMA-based 5G Cellular Systems

Keerthana,

Selvaraj

2024

AEU - International Journal of Electronics and Communications

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Performance Analysis of Selective DF Cooperative NOMA in Presence of Practical Impairments

Cited by 9 publications

References 42 publications

Throughput performance optimization of NOMA-assisted cooperative relay system with realistic impairments

Throughput performance optimization of NOMA-assisted cooperative relay system with realistic impairments

Sum-rate maximization for a distributed space-time block code-aided cooperative NOMA with energy harvesting

Scaled Selection Combining Receiver for Cooperative NOMA-based 5G Cellular Systems

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