Cooperative non‐orthogonal multiple access with SWIPT over Nakagami‐<i>m</i> fading channels

Kader, Md. Fazlul; Uddin, Mohammad Belal; Islam, Anik; Shin, Soo Young

doi:10.1002/ett.3571

Cited by 34 publications

(137 citation statements)

References 35 publications

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“…In order to compare the performance of UCD‐NOMA with a conventional approach, an OMA scheme (UCD‐OMA) regarding the time division multiple access is considered as a benchmark. In UCD‐OMA, four time slots (two time slots for individual user's data transmission by UE 1 and UE 2 ; two more time slots for Re to transmit two different users data) are needed to accomplish the data transmission . Therefore, the E‐SC of UCD‐OMA scheme is expressed as

\begin{matrix} alignleft \\ align-1 R_{Sum}^{OMA} & align-2 = \frac{1}{4} \log_{2} (1 + \min (ρ | h_{1 r} |^{2}, ρ | h_{1 b} |^{2} + ρ | h_{r b} |^{2})) \\ align-1 & align-2 + \frac{1}{4} \log_{2} (1 + \min (ρ | h_{2 r} |^{2}, ρ | h_{2 b} |^{2} + ρ | h_{r b} |^{2})) \\ align-1 & align-2 = \frac{1}{4} \log_{2} (1 + \min (γ_{4, O}^{{UE}_{1}}, γ_{MRC, O}^{{UE}_{1}})) + \frac{1}{4} \log_{2} (1 + \min (γ_{3, O}^{{UE}_{2}}, γ_{MRC, normalO}^{{UE}_{2}})), \end{matrix}

where

…”

Section: Capacity Analysismentioning

confidence: 99%

Uplink cooperative diversity using power‐domain nonorthogonal multiple access

Uddin

Kader

Shin

2019

Trans Emerging Tel Tech

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In this paper, an uplink scheme that exploits cooperative diversity using power domain nonorthogonal multiple access (NOMA), termed UCD-NOMA, with successive interference cancelation receivers is proposed. A two-user case is considered, where both the NOMA users can communicate with the base station directly and indirectly via a half-duplex decode-and-forward relay. Under perfect and imperfect successive interference cancelation assumptions, the ergodic sum capacity, outage probability, and outage sum capacity of the considered protocol are analyzed over the Rayleigh fading channel. As a protocol with which to compare the proposed UCD-NOMA protocol, an uplink cooperative network using a conventional multiple access technique (termed UCD-OMA) is also considered and analyzed. The performance excellence of UCD-NOMA as compared to UCD-OMA is clarified through simulations and theoretical analyses.Trans Emerging Tel Tech. 2019;30:e3678.wileyonlinelibrary.com/journal/ett

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\begin{matrix} alignleft \\ align-1 R_{Sum}^{OMA} & align-2 = \frac{1}{4} \log_{2} (1 + \min (ρ | h_{1 r} |^{2}, ρ | h_{1 b} |^{2} + ρ | h_{r b} |^{2})) \\ align-1 & align-2 + \frac{1}{4} \log_{2} (1 + \min (ρ | h_{2 r} |^{2}, ρ | h_{2 b} |^{2} + ρ | h_{r b} |^{2})) \\ align-1 & align-2 = \frac{1}{4} \log_{2} (1 + \min (γ_{4, O}^{{UE}_{1}}, γ_{MRC, O}^{{UE}_{1}})) + \frac{1}{4} \log_{2} (1 + \min (γ_{3, O}^{{UE}_{2}}, γ_{MRC, normalO}^{{UE}_{2}})), \end{matrix}

where

…”

Section: Capacity Analysismentioning

confidence: 99%

Uplink cooperative diversity using power‐domain nonorthogonal multiple access

Uddin

Kader

Shin

2019

Trans Emerging Tel Tech

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“…The SWIPT technique also allows users to simultaneously perform wireless information transmission (WIT) and WPT 13 . Some studies have been used SWIPT techniques in a variety of structures such as point‐to‐point channels, 14,15 relay‐based systems, 16,17 multiuser orthogonal frequency division multiple (OFDM) systems, 18‐20 multiple‐input multiple‐output (MIMO) channels, 21,22 opportunistic channels, 23 and cooperative systems 24‐26 …”

Section: Introductionmentioning

confidence: 99%

Sum‐throughput maximization for overlay cognitive wireless powered network with energy harvesting capability

Rezaie

Dosaranian‐Moghadam

Bakhshi

et al. 2020

Trans Emerging Tel Tech

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In this article, a novel time division multiple access (TDMA)-based approach for optimal resource allocation in an overlay cognitive wireless powered communication network is proposed. In this network, power in the secondary network (SN) is provided by the primary network (PN) in addition to its own wireless network. Using the TDMA and a harvest-then-transmit protocol, the time and power allocation for downlink wireless energy transfer (WET) and uplink wireless information transmission (WIT) are jointly optimized to maximize the sum-throughput in SN. Quality of service in PN and power and time in SN, as the main constrains are considered for sum-throughput maximization in this network. This is a non-convex problem which gets converted to a convex problem using active interference-temperature control technique. Moreover, a new closed-form expression which results in sub-optimal power and time-allocation (SO-PT-A) is addressed. The performance of proposed algorithm is compared with the equal time allocation (ETA) and fixed TDMA-allocation (FTDMA-A) algorithms which impose some special constraints for optimal power and time allocation. The simulation results depict that the SO-PT-A algorithm outperforms the ETA and FTDMA-A algorithms. Eventually, the performance of the SO-PT-A algorithm is evaluated with other well-known algorithms considering different values of the average and maximum transmit power of the hybrid-access point (H-AP), the number of secondary users (SUs) and path loss exponent.

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“…Closed-form and closed-form approximate expressions of outage probability were achieved. In [17], two protocols based on SWIPT, namely CNOMA-SWIPT-PS and CNOMA-SWIPT-TS, were proposed. The effectiveness of the proposed schemes was demonstrated over OMA and the work of [18].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Power-Splitting Relaying Protocol in SWIPT Based Cooperative NOMA Systems

Tran

Phan

Vien³

2020

Preprint

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This paper investigates a relay assisted simultaneous wireless information and power transfer (SWIPT) for downlink in cellular systems. Cooperative non-orthogonal multiple access (C-NOMA) is employed along with power splitting (PS) protocol to enable both energy harvesting (EH) and information processing (IP). A downlink model consisting of a base station (BS) and two users is considered, in which the near user (NU) is selected as a relay to forward the received signal from the BS to the far user (FU). Maximum ratio combining is then employed at the FU to combine both the signals received from the BS and NU. Closed form expressions of outage probability (OP), throughput, ergodic rate and energy efficiency (EE) are firstly derived for the SWIPT based C-NOMA considering both scenarios of having and without having direct link between the BS and FU. The impacts of EH time, EH efficiency, power-splitting ratio, source data rate and distance between different nodes on the performance are then investigated. The simulation results show that the C-NOMA with direct link achieves an outperformed performance over C-NOMA without direct link. Moreover, the performance of C-NOMA with direct link is also higher than that for OMA. Specifically, (i) the outage probability for C-NOMA in both direct and relaying link cases is always lower than that for OMA. (ii) the outage probability, throughput and ergodic rate vary according to b, (iii) the EE of both users can obtain in SNR range of from -10 to 5 dB and it decreases linearly as SNR increases. Numerical results are provided to verify the findings.

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Cooperative non‐orthogonal multiple access with SWIPT over Nakagami‐m fading channels

Cited by 34 publications

References 35 publications

Uplink cooperative diversity using power‐domain nonorthogonal multiple access

Uplink cooperative diversity using power‐domain nonorthogonal multiple access

Sum‐throughput maximization for overlay cognitive wireless powered network with energy harvesting capability

Performance Analysis of Power-Splitting Relaying Protocol in SWIPT Based Cooperative NOMA Systems

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