Adaptive Transmission for Cooperative NOMA System With Buffer-Aided Relaying

Luo, Sheng; Teh, Kah Chan

doi:10.1109/lcomm.2016.2647250

Cited by 102 publications

(77 citation statements)

References 12 publications

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“…Moreover, the NOMA schemes are sensitive to both CSI imperfection and the varying of distance from the destination. 31,32 In addition, it needs a complicated optimization process in order to tune the values of power allocation coefficients needed and to select the optimal relay to have an effective multiuser interference approach. A brief comparison of these literatures is also included in Table 1.…”

Section: Prior Workmentioning

confidence: 99%

“…For example, the NOMA scheme in the work of Men and Ge achieves a diversity of

\min false(J_{a}, j \times M false)

for the j th user instead of the interference‐free diversity gain targeted here. Moreover, the NOMA schemes are sensitive to both CSI imperfection and the varying of distance from the destination . In addition, it needs a complicated optimization process in order to tune the values of power allocation coefficients needed and to select the optimal relay to have an effective multiuser interference approach.…”

Section: Introductionmentioning

confidence: 99%

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Low‐complexity and full‐diversity parallel interference cancellation for multiuser wireless relaying networks

Astal¹,

Ismail

Alouini

et al. 2019

Trans Emerging Tel Tech

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In this paper, the multiuser interference of wireless relaying networks (WRNs) is considered. Two transmission protocols with an interference cancellation scheme are proposed, namely, the concurrentS − R−D‐PICR,D protocol for decode‐and‐forward WRNs and the concurrentS − R − D‐PICD protocol for amplify‐and‐forward WRNs. Unlike the existing protocols, these protocols allow the concurrent transmission in both phases of the transmission, and hence, higher spectral efficiency is offered while maintaining low decoding complexity. The concurrentS − R − D‐PICR,D protocol achieves interference‐free diversity without imposing any condition on the node's antenna number. However and similar to most existing protocols, this protocol requires the channel state information (CSI) of the users‐relay links at the relay. In contrast, the concurrentS − R − D‐PICD protocol achieves a better diversity order, given that the relay's antenna >8, whereas CSI is required only at the destination. Although the diversity's upper bound is not achieved, this protocol uses a simple relay as no CSI or encoding is required at the relay. In addition and unlike the existing protocols, the achievable diversity is determined by both the user's and the destination's antennas, and it is not sacrificed while the number of users is increased. This paper also establishes sufficient conditions for a space‐time block code to achieve the mentioned diversity gain of the proposed protocols.

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Section: Prior Workmentioning

confidence: 99%

“…For example, the NOMA scheme in the work of Men and Ge achieves a diversity of

\min false(J_{a}, j \times M false)

Section: Introductionmentioning

confidence: 99%

Low‐complexity and full‐diversity parallel interference cancellation for multiuser wireless relaying networks

Astal¹,

Ismail

Alouini

et al. 2019

Trans Emerging Tel Tech

View full text Add to dashboard Cite

show abstract

“…It is also noted that there is one half spectral efficiency penalty for relaying in (11), whereas there is no spectral efficiency penalty in (12) as the source transmits an independent data symbol to the destination directly for a given time slot when ݃ ௌ > ݃ ௌோ . Then, using (11) and (12), the achievable average rate of the O-NOMA is obtained as…”

Section: ‫ܥ‬mentioning

confidence: 99%

Achievable Rate Analysis for Opportunistic Non-orthogonal Multiple Access-Based Cooperative Relaying Systems

2017

J Inf Process Syst

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In this paper, we propose the opportunistic non-orthogonal multiple access (NOMA)-based cooperative relaying system (CRS) with channel state information (CSI) available at the source, where CSI for the sourceto-destination and source-to-relay links is used for opportunistic transmission. Using the CSI, for opportunistic transmission, the source instantaneously chooses between the direct transmission and the cooperative NOMA transmission. We provide an asymptotic expression for the average achievable rate of the opportunistic NOMA-based CRS under Rayleigh fading channels. We verify the asymptotic analysis through Monte Carlo simulations, and compare the average achievable rates of the opportunistic NOMA-based CRS and the conventional one for various channel powers and power allocation coefficients used for NOMA.

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“…Improved throughput was achieved in Reference with the proposed scheme, which, based on channel quality between relay and user, determines whether to use NOMA. The scheme of power allocation optimization in the NOMA scheme is investigated in Reference from the global energy efficiency point of view.…”

Section: Introductionmentioning

confidence: 99%

Adaptive NOMA towards 5G green wireless network

Jain

Gupta

2020

Trans Emerging Tel Tech

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A nonorthogonal multiple access (NOMA) enabled downlink single‐cell communication network with cooperating relay nodes, is considered in this article. NOMA simultaneously transmits signals to a group of users. The formation of the group users, in NOMA, depends on their spatial restrictions. These spatial restrictions are defined by the transmission range of the relay equipment. Therefore, it is important to find the transmission range of the relay. This article presents a novel angle selection scheme for finding the transmission range of the relay. Ever‐increasing cellular traffic needs improvement in data rates and power saving. So, an adaptive NOMA scheme in which the system adaptively chooses its working model is proposed in this article. The adaptive NOMA scheme maximizes the sum rate and optimizes the energy efficiency of the fifth‐generation communication network. It also reduces the power consumption at the circuit of the end‐user equipment, hence, achieving power saving. Comprehensive numerical results emphasize that the proposed scheme achieves higher system energy efficient as compared to the conventional NOMA scheme. Such an adaptive framework also improves the average signal‐to‐interference noise ratio and the fairness factor, as shall be examined. The implications of proposing an adaptive NOMA network are evaluated through simulation results.

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Adaptive Transmission for Cooperative NOMA System With Buffer-Aided Relaying

Cited by 102 publications

References 12 publications

Low‐complexity and full‐diversity parallel interference cancellation for multiuser wireless relaying networks

Low‐complexity and full‐diversity parallel interference cancellation for multiuser wireless relaying networks

Achievable Rate Analysis for Opportunistic Non-orthogonal Multiple Access-Based Cooperative Relaying Systems

Adaptive NOMA towards 5G green wireless network

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