Joint Power Allocation and Splitting Control for SWIPT-Enabled NOMA Systems

Tang, Jie; Yu, Yu; Liu, Mingqian; So, Daniel K. C.; Zhang, Xiu Yin; Li, Zan; Wong, Kai-Kit

doi:10.1109/twc.2019.2942303

Cited by 60 publications

(35 citation statements)

References 39 publications

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“…In Figure 4, we show the effects of NOMA power-allocation factors, β = a 1 = b 1 , on the secrecy performance. Similarly, for given value of R x 2 th , there is an upper limit for β, denoted as β max (using (7), (13) and 14, we can show that max{a 1…”

Section: Resultsmentioning

confidence: 95%

“…In the NOMA scenario, the work of [12] designed strategies for a wireless-powered uplink NOMA to maximize the system throughput or achieve the high fairness in throughput of users. A similar work concerning the energy-and-rate efficiency was presented in [13]. The authors of [14] exploited the advantage in distance of the near user (NU) to perform a SWIPT-based cooperative communication; hence, NU can set up an additional link to the far user (FU) using its harvested energy.…”

Section: Introductionmentioning

confidence: 99%

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Secure Communication in Cooperative SWIPT NOMA Systems with Non-Linear Energy Harvesting and Friendly Jamming

Tuan

Hong

2020

Sensors

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This paper studies the secure communication of a non-orthogonal multiple-access (NOMA) relaying system in the presence of an eavesdropper in which the NOMA communication between a source and two users is assisted by an energy-harvesting (EH) relay. The relay extracts a part of its received signal strength using a power-splitting (PS) policy then harvests energy using a non-linear EH (NLEH) circuit. A friendly jammer sends jamming signals to help secure communication. The jammer is exploited as an additional energy source. A store-and-transmit (SaT) scheme which allows the EH relay to perform energy storing and information transmitting is proposed. For performance evaluation, the closed-form expressions for three metrics, secrecy outage probability (SOP), average achievable secrecy rate (AASR) and average stored energy (ASE) are derived. These results enable studies on the effects of various system parameters, such as NOMA power-allocation factors, target secrecy rates, jammer’s location, and relay’s power levels, on the system performance.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Secure Communication in Cooperative SWIPT NOMA Systems with Non-Linear Energy Harvesting and Friendly Jamming

Tuan

Hong

2020

Sensors

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“…For baseline scheme 3, we consider our proposed scheme based on the OMA in which we set L = 1 for the simulation results. For baseline scheme 4, we consider our proposed scheme in which the SIC ordering is done based on the sorting the channel gains as considered commonly in the literature [27], [29], [33]. It can be observed that our proposed method clearly outperforms the other baseline schemes due to the performing joint resource allocation policy.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…In particular, the authors in [26] aimed to maximize the total energy efficiency of time switching (TS)-SWIPT assisted NOMA system, by considering the joint optimization of TS ratio and power allocation. In [27], a joint splitting control and power allocation in a PS-SWIPT enabled NOMA system were investigated. The authors aimed to optimize the harvested energy and total transmission rate, simultaneously.…”

Section: B Related Workmentioning

confidence: 99%

“…Nonetheless, to the best of authors knowledge the problem of joint subcarrier allocation, beamforming design, and decoding order for ID user, and energy beam for EH users in a NOMA assisted SWIPT while considering a non-linear energy harvesting model has not been addressed yet. Besides, in contrast to works in [27], [29], [33], we also consider SIC decoding order at the receiver due to coupling between beamfroming design and subcarrier allocation. In the paper we aim at addressing these challenges.…”

Section: B Related Workmentioning

confidence: 99%

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Resource Allocation for MC MISO-NOMA SWIPT-Enabled HetNets With Non-Linear Energy Harvesting

2020

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This paper proposes a resource allocation for multi carrier (MC) multiple input single output (MISO) non-orthogonal multiple access (NOMA) enabling simultaneous wireless information and power transfer (SWIPT) where a separated architecture (SA)-based heterogeneous network (HetNet) is considered. More precisely, we focus on designing MC MISO-NOMA scheme in HetNets, where each base stations (BSs) serves multiple information decoding (ID) and energy harvesting (EH) users with a non-linear energy harvesting model which are equipped with multi antennas. For this configuration, we propose a joint subcarrier assignment, beamforming design, and energy beamforming to maximize the total rate of the network. Moreover, we take into account the condition of cross-layer interference constraints to coordinate interference, satisfying a minimum data rate requirement, fulfilling a minimum harvested energy, and respecting the maximum allowed power transfer constraints. We also consider successive interference cancellation (SIC) decoding order to detect the signal of each user due to coupling between SIC order, beamforming design, and subcarrier allocation. As a result of interference in the rate function, our optimization problem is non-convex and thus challenging to solve. Subsequently, first we adopt semidefinite relaxation (SDR) for beamforming design and then an efficient algorithm via the majorization minimization (MM) approach based on the difference of convex (DC) programming is proposed to obtain a locally optimal solution for the original problem. Simulation results reveal the superiority of our proposed scheme as compared to other existing works addressed in the literature. INDEX TERMS Multi carrier (MC), multiple input single output (MISO), non-orthogonal multiple access (NOMA), simultaneous wireless information and power transfer (SWIPT), subcarrier assignment, beamforming design, and successive interference cancellation (SIC).

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Optimal precoders and power splitting factors in multiuser multiple‐input multiple‐output cognitive decode‐and‐forward relay systems with wireless energy harvesting

Kha

2021

Int J Communication

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This paper considers an underlay cognitive radio (CR) wireless network with the assistance of a two-hop decode-and-forward (DF) relay node. Different from the conventional CR relay networks, in this paper, the relay node using power-splitting (PS) techniques harvests wireless energy transmitted from the secondary base station (SBS) and, then, uses its harvested energy to forward the received signals to multiple secondary receive users (SRUs). Due to the highly mutual dependence of the transmission strategies at nodes on the system performance, the optimal design of signal processing at transceivers to efficiently handle the interference and energy constraints is crucial. This paper studies the jointly optimal design of the precoders, PS factors to maximize the minimum user rate under the transmit power, harvested energy, and interference power constraints. Owing to the nonlinearly and mutually coupled design matrix variables in both objective function and constraints, the joint design of the precoders and PS factors for the concerned problem is mathematically challenging. To tackle these difficulties, we devise the appropriate surrogate functions to recast the nonconvex optimization problem into the convex one.By using the minorization-maximization framework, an efficient iterative algorithm with provable convergence is developed by solving the convex optimization problem in each iteration. Numerical results are provided to evaluate the achievable user rate performance of the considered system and investigate the effects of the interference power thresholds at the primary receive users and the number of antennas at the SBS and the relay on the minimum achievable user rate. K E Y W O R D S cognitive radio, MIMO users, relay networks, simultaneously wireless information and power transfer (SWIPT) 1 | INTRODUCTION Cognitive radio (CR) has been recognized as an effective means to deal with the spectrum scarcity for the next generation of wireless communications. In underlay CR approaches, secondary users (SUs) can communicate at the same time

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Joint Power Allocation and Splitting Control for SWIPT-Enabled NOMA Systems

Cited by 60 publications

References 39 publications

Secure Communication in Cooperative SWIPT NOMA Systems with Non-Linear Energy Harvesting and Friendly Jamming

Secure Communication in Cooperative SWIPT NOMA Systems with Non-Linear Energy Harvesting and Friendly Jamming

Resource Allocation for MC MISO-NOMA SWIPT-Enabled HetNets With Non-Linear Energy Harvesting

Optimal precoders and power splitting factors in multiuser multiple‐input multiple‐output cognitive decode‐and‐forward relay systems with wireless energy harvesting

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