Wireless Powered Relaying Networks Under Imperfect Channel State Information: System Performance and Optimal Policy for Instantaneous Rate

Do, Dinh‐Thuan; Nguyen, Hoang-Sy; Vozňák, Miroslav; Nguyen, Thanh-Sang

doi:10.13164/re.2017.0869

Cited by 39 publications

(35 citation statements)

References 25 publications

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“…wave, solar, wind, etc.) can be collected to transform into electricity [1][2][3][4][5][6][7]. In particular, the authors in [8] proposed two relaying protocols so-called time switching-based relaying (TSR) protocol and power splittingbased relaying (PSR) protocol to enable EH and information processing at the relay node.…”

Section: Introductionmentioning

confidence: 99%

Wireless powered D2D communications underlying cellular networks: design and performance of the extended coverage

Nguyen

Vozňák

2017

Automatika

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Because of the short battery life of user equipments (UEs), and the requirements for better quality of service have been more demanding, energy efficiency (EE) has emerged to be important in device-to-device (D2D) communications. In this paper, we consider a scenario, in which D2D UEs in a half-duplex decode-and-forward cognitive D2D communication underlying a traditional cellular network harvest energy and communicate with each other by using the spectrum allocated by the base station (BS). In order to develop a practical design, we achieve the optimal time switching (TS) ratio for energy harvesting. Besides that, we derive closedform expressions for outage probability, sum-bit error rate, average EE and instantaneous rate by considering the scenario when installing the BS near UEs or far from the UEs. Two communication types are enabled by TS-based protocol. Our numerical and simulation results prove that the data rate of the D2D communication can be significantly enhanced.

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Section: Introductionmentioning

confidence: 99%

Wireless powered D2D communications underlying cellular networks: design and performance of the extended coverage

Nguyen

Vozňák

2017

Automatika

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“…Following the principle of energy harvesting [14][15][16][17][18][19], the harvested power is given by…”

Section: A First Phase: Energy Harvestingmentioning

confidence: 99%

“…In this section, the outage probability is main metric considered in our proposed model. The outage performance is defined in many works [14][15][16][17]. We now consider outage probability for such NOMA transmission as below.…”

Section: Outage Performance Analysis In Scheme Imentioning

confidence: 99%

“…In addition, dangers related to batteries leakage and many of these energy-limited applications using batteries that cannot be substituted or re-energized are explored. Fortunately, recent research interest introduced energy harvesting as only one solution to tackle such a problem, though energy harvesting is that has generated a great deal applied in wireless sensor networks [14]- [18]. Compared to using traditional batteries in terms of batteries replacement and batteries external recharging, energy harvesting can exhibit essentially limitless energy.…”

Section: Introductionmentioning

confidence: 99%

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Outage Performance Analysis of Cell-Center/Edge Users Under Two Policies of Energy Harvesting

Do¹,

Le²,

Le³

et al. 2019

ELEKTRON ELEKTROTECH

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In this paper, two energy harvesting policies deploying in cooperative non-orthogonal multiple access (NOMA) systems are considered. After period of wireless power transfer, the NOMA users including cell-edge and cell-center users simultaneously transmit the superposition coded symbols to the base station (BS). In the last time slot, the BS decodes to achieve its signal based on superposition coded symbol with corresponding power allocation factors. This paper provides exact expressions of outage probability in two schemes. Performance gap of two NOMA users can be raised by providing different power allocation factors. It is confirmed by numerical result. Distance and data rate are main factors affecting outage performance. Scheme I exhibit scenario where power beacon transmits energy signal to NOMA user while the BS feeds energy to NOMA user in Scheme II. It is shown that outage performance of Scheme I is better than that of Scheme II.

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“…Nevertheless, regarding traditional relay nodes using batteries to power and hence such mobile devices meet limited performance due to the short battery lifespan. In the previous studies, the authors have put forward EH protocol in relaying networks. For instance, assuming a stationary and ergodic process in terms of energy scavenged by the relay, by taking energy‐constrained and energy‐unconstrained relays into account, the symbol error rate was obtained.…”

Section: Introductionmentioning

confidence: 99%

Impact of fixed power allocation in wireless energy harvesting NOMA networks

2019

Int J Communication

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The time switching-based relaying (TSR) scheme is considered in energy harvesting protocol to implement with its advantage to nonorthogonal multiple access (NOMA) system. In particular, decode-and-forward (DF) mode is proposed to employ in relay to forward signal to serve two far NOMA users. There are two main metrics including outage probability and ergodic rate, which are derived in exact expressions with respect to varying performance under impacts of energy harvesting fractions. To evaluate system performance, outage event and related capacity are illustrated, and we tailor performance gap among two NOMA users and such gap can be controlled by selecting of appropriate power allocation factors assigned for each user to obtain optimal performance. By examining node arrangement, target rates and varying transmit signal to noise ratio (SNR), it can be further achieved performance in several situations of such NOMA. As important result, the considered NOMA system outperforms than the conventional multiple access scheme, and this expected result is confirmed in numerical result and theoretical results. We also explore impacts of transmit power at source, noise power, the other key parameters of energy harvesting scheme to exhibit outage, and ergodic performance. Simulation results are presented to corroborate the proposed methodology. KEYWORDS decode and forward, energy harvesting, non-orthogonal multiple access, outage probability Int J Commun Syst. 2019;32:e4016.wileyonlinelibrary.com/journal/dac

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Wireless Powered Relaying Networks Under Imperfect Channel State Information: System Performance and Optimal Policy for Instantaneous Rate

Abstract: Abstract. In this investigation, we consider wireless powered relaying systems KeywordsAmplify-and-forward, decode-and-forward, throughput, channel state information, outage probability, cooperative network, bit error rate, energy harvesting

Cited by 39 publications

References 25 publications

Wireless powered D2D communications underlying cellular networks: design and performance of the extended coverage

Wireless powered D2D communications underlying cellular networks: design and performance of the extended coverage

Outage Performance Analysis of Cell-Center/Edge Users Under Two Policies of Energy Harvesting

Impact of fixed power allocation in wireless energy harvesting NOMA networks

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