Evaluating the Ergodic Rate in SWIPT-Aided Hybrid NOMA

Zaidi, Syeda Kanwal; Hasan, Syed Faraz; Gui, Xiang

doi:10.1109/lcomm.2018.2849071

Cited by 45 publications

(39 citation statements)

References 9 publications

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“…where E |x 1 | 2 = 1. Interestingly, thanks to the different receiver mechanisms, two signals are split and differentiated with the power allocation at S as in [21]. Following that, another signal symbol denoted as x 2 is transferred to D with P S in the second time slot, in which E |x 2 | 2 = 1.…”

Section: System Modelmentioning

confidence: 99%

“…To this point, e −x = 1 − x can be approximated when x → 0 as in ( [28], Equation (1.211.1)) from (12). After some algebraic manipulations, (21) and (22) are obtained for the proof of Proposition 2.…”

Section: Propositionmentioning

confidence: 99%

“…This nature results in better SE [20]. In addition, NOMA balances the user fairness and the system throughput while conventional orthogonal multiple access (OMA) only serves users with strong channel conditions [21]. This is because users with different channel conditions can be served timely which meets the rising demands for ultra-low latency and ultra-high connectivity in 5G future communications.…”

Section: Introductionmentioning

confidence: 99%

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Outage Probability Analysis in Relaying Cooperative Systems with NOMA Considering Power Splitting

Nguyen

et al. 2019

Symmetry

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In recent years, non-orthogonal multiple access (NOMA) has become a promising technology for the advancement of future wireless communications. In principle, the relay node with better channel conditions can support others to enhance the system performance by using successive interference cancellation (SIC) technique. In this paper, we take advantage of NOMA in the study of a relaying cooperative system operating in half-duplex (HD) fixed decode-and-forward (DF) relaying scheme. In the two time slots, two data symbols are received at the destination node resulting in a higher transmission rate. Besides that, we study energy harvesting (EH) with power splitting (PS) protocol. For performance analysis, approximate and exact closed-form expressions for outage probability (OP) are obtained. Following that, we examine the average bit error probability (ABEP) while expressions for the throughput in delay-limited mode are given. It can be seen that our simulation results match well with the Monte Carlo simulations.

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Section: System Modelmentioning

confidence: 99%

Section: Propositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Outage Probability Analysis in Relaying Cooperative Systems with NOMA Considering Power Splitting

Nguyen

et al. 2019

Symmetry

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“…By allowing energy harvesting, the system maintains distinct power levels when the users commence NOMA transmissions [18]. It is worth noting that harvested energy is re-used for signal processing in a 3-phase scheme of energy-harvesting NOMA [19]. In particular, the authors in [19] presented the case in which the NOMA user harvests energy from the received downlink signals to further the process on the uplink, which leads to improving the average ergodic rate of the system.…”

Section: Introductionmentioning

confidence: 99%

“…It is worth noting that harvested energy is re-used for signal processing in a 3-phase scheme of energy-harvesting NOMA [19]. In particular, the authors in [19] presented the case in which the NOMA user harvests energy from the received downlink signals to further the process on the uplink, which leads to improving the average ergodic rate of the system. In recent work, a low-complexity iterative algorithm has been proposed to maximize the energy efficiency of the D2D pair in an energy harvesting-enabled device-to-device (D2D) NOMA [20].…”

Section: Introductionmentioning

confidence: 99%

Wireless-Powered Cooperative MIMO NOMA Networks: Design and Performance Improvement for Cell-Edge Users

Vozňák

2019

Electronics

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In this paper, we study two transmission scenarios for the base station (BS) in cellular networks to serve the far user, who is located at the cell-edge area in such a network. In particular, we show that wireless-powered non-orthogonal multiple access (NOMA) and the cell-center user in such a model can harvest energy from the BS. To overcome disadvantages of the cell-edge user due to its weak received signal, we fabricate a far NOMA user with multiple antennas to achieve performance improvement. In addition, the first scenario only considers a relay link deployed to forward signals to a far NOMA user, while both direct links and relay links are generally enabled to serve a far user in the second scenario. These situations, together with their outage performance, are analyzed and compared to provide insights in the design of a real-multiple-antenna NOMA network, in which the BS is also required to equip multiple antennas for robust quality of transmission. Higher complexity in computations is already known in consideration of outage metrics with respect to performance analysis, since the system model employs multiple antennas. To this end, we employ a transmit antenna selection (TAS) policy to formulate closed-form expressions of outage probability that satisfies the quality-of-service (QoS) requirements in the NOMA network. Our simulation results reveal that the performance of the considered system will be improved in cases of higher quantity of transmit antennas in dedicated devices. Finally, the proposed design in such a NOMA system cannot only ensure a downlink with higher quality to serve a far NOMA user, but also provide significant system performance improvement compared to a traditional NOMA networks using a single antenna.

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Efficient resource allocation for hybrid nonorthogonal multiple access based heterogeneous networks beyond fifth‐generation

Ghafoor

Ali

Khan

et al. 2022

Trans Emerging Tel Tech

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Fifth‐generation (5G) and future beyond fifth‐generation (B5G) networks will require immense capacity due to the high rise in the number of multimedia applications and mobile devices. The heterogeneous networks (HetNets) in 5G and B5G can increase the heterogeneity and network throughput because macro base station‐only (MBS‐only) networks cannot satisfy the drastic increase in capacity demands. Hybrid nonorthogonal multiple access (H‐NOMA) can accommodate the increasing number of multimedia applications and mobile devices in 5G and B5G. H‐NOMA in B5G can also improve spectral efficiency. Before this, the researchers had not considered user clustering with H‐NOMA in HetNets. This article investigates the user clustering with downlink H‐NOMA in HetNet to maximize the network throughput in 5G and B5G. The formulated mathematical problem optimizes the considered key performance indicators (KPIs), that is, users admission in clusters, users association with base stations, power allocation to users, and network throughput. At the same time, it also satisfies the minimum transmit power and data rate requirements of users. The formulated problem is a mixed‐integer nonlinear programming (MINLP) problem. We have proposed an ϵ$$ \epsilon $$‐optimal algorithm, that is, outer approximation algorithm (OAA) to solve the MINLP problem because the complexity of the optimal exhaustive search algorithm (ESA) increases exponentially with an increase in the number of users. H‐NOMA with user clustering in HetNet is evaluated with extensive simulations to show its effectiveness regarding network throughput in 5G and B5G. We have also considered the proposed framework in the MBS‐only network and compared its performance with HetNet. The results verify that the proposed framework in HetNet performs better than the MBS‐only network. The complexity of the ϵ$$ \epsilon $$‐optimal algorithm is calculated that gives ϵ$$ \epsilon $$‐optimal results within ϵ=10prefix−3$$ \epsilon =1{0}^{-3} $$. We have also made a complexity analysis of the proposed OAA and ESA and concluded that the complexity of the proposed OAA algorithm is less than the ESA.

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Evaluating the Ergodic Rate in SWIPT-Aided Hybrid NOMA

Cited by 45 publications

References 9 publications

Outage Probability Analysis in Relaying Cooperative Systems with NOMA Considering Power Splitting

Outage Probability Analysis in Relaying Cooperative Systems with NOMA Considering Power Splitting

Wireless-Powered Cooperative MIMO NOMA Networks: Design and Performance Improvement for Cell-Edge Users

Efficient resource allocation for hybrid nonorthogonal multiple access based heterogeneous networks beyond fifth‐generation

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