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BER versus energy harvesting time for the TS‐DF, TS‐DF‐STC, and TS‐AF schemes (antenna noise variance 2 a 0.01
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In this paper, we propose various kinds of two-way multi-antenna relaying with simultaneous wireless information and power transfer (SWIPT) and investigate their performance. Specifically, we first consider a two-way relay network where two single-antenna end nodes communicate with each other through a multi-antenna relay node that is energy constr...
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In this paper, we investigate the performance of dual-hop relaying networks with wireless energy harvesting at the relay node over generalized η-μ and κ-μ fading channels. Our analysis considers decode-and-forward relays with a single antenna as well as source and destination nodes equipped with a single antenna. Specifically, we derive an accurate...
Energy harvesting (EH) is believed to be a promising technology in next generation wireless networks due to its potential to extend the working time for uncharged nodes and improve the user experience. We investigate the outage performance of dual-hop decode-and-forward relay networks, where EH from wireless signals is considered at the relay node....
The design of energy harvesting (EH) scheme is one of important issues in energy-constrained relaying networks. Since most of the existing EH schemes assume a linear EH model, which cannot capture the properties of EH circuits, the EH schemes dedicated for a practical EH model should be redesigned. Based on the time switching (TS) and power splitti...
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... Whereas, the TS antenna was easy to apply and had no issues. However, single time switching antenna can't serve energy harvesting as well as information decoding in a simultaneous manner [5]. ...
Optimum transmission strategy must be adopted in radio frequency energy-harvesting networks. For the purpose the study considered various radio applications in which the nodes operate on the batteries thereby minimizing the energy consumption and consequently obtaining high throughput and satisfactory delay. This paper analysed the best model for minimizing transmission energy which reduces the total consumption of energy needed to send required number of bits. Hence the study exploited proximal gradient convex optimization algorithm and spatial filter-based beam formers for minimizing the transmission power and reducing the computational time. These minimizations might be achieved by optimizing the signal to noise ratio. In general, receiving signals radiating from a particular location and directing the signal reception or transmission seems to be a challenging task. To overcome this the proposed spatial filter-based beamforming, a signal processing technique receives signals that are radiating from specific location and also attenuate signals from different locations. Moreover, it can easily direct signal reception or transmission. The simulation results depicted that the proposed algorithm is found to be energy efficient that describes the trade-off existing between the required harvested powers. This study employed Multi-objective Hungarian algorithm for the detection of channels that have low transmission power and less computational time for efficient resource allocation. The performance evaluation of the proposed system has been validated and compared with state of art methods like Joint optimization, fixed time allocation and bisectional search. The experimental results show that the proposed system outperforms the existing systems in terms of signal to noise ratio, transmission of energy and resource allocation.
... Unlike, the TS antenna was easy to apply and didn't have such issues. But, a single TS antenna couldn't serve EH as well as ID simultaneously [16]. Thus came the need for a MIMO system. ...
Wireless powered communication Network (WPCN) is a recent and emerging study that deliberates on powering multiple numbers of wireless devices in a network by the use of wireless power transfer (WPT). The wireless devices consume more power for performing data and energy transfer simultaneously resulting in the need for a frequent human intervention involving the replacement of batteries in the devices. This eventually decreases the lifespan of the network. This paper deals with the construction of a WPCN whose main objective is to reduce the power consumption for the wireless network groups under consideration. For this, we have used an optimization technique that combines ant colony optimization and particle swarm optimization. The combined optimization technique has proven to reduce the consumption of power in wireless devices, thus improving the lifespan of the network. The outputs generated by simulations are shown and are verified mathematically.
... The numerical results illustrated that either increasing the number of relay nodes or raising the transmit power was beneficial for the considered networks. The paper can be extended in several directions: (i) We can replace the fixed relay by high mobility unmanned aerial vehicles (UAVs) devices [43,44] or employ advanced meta material technology to enhance energy efficiency, i.e., the reconfigurable intelligent surfaces (RIS) [45,46]; (ii) Diversity combining at the destination, i.e., maximal ratio combining or selection combining, would also be considered a simple solution to raise the system's diversity gain [47,48]; (iii) Consideration of the networks could extend to investigating the security aspect as well [49,50]; and (iv) Two-way relaying or full-duplex relaying would be a feasible and interesting extension as well [51,52]. ...
In the present paper, we investigate the performance of the simultaneous wireless information and power transfer (SWIPT) based cooperative cognitive radio networks (CCRNs). In particular, the outage probability is derived in the closed-form expressions under the opportunistic partial relay selection. Different from the conventional CRNs in which the transmit power of the secondary transmitters count merely on the aggregate interference measured on the primary networks, the transmit power of the SWIPT-enabled transmitters is also constrained by the harvested energy. As a result, the mathematical framework involves more correlated random variables and, thus, is of higher complexity. Monte Carlo simulations are given to corroborate the accuracy of the mathematical analysis and to shed light on the behavior of the OP with respect to several important parameters, e.g., the transmit power and the number of relays. Our findings illustrate that increasing the transmit power and/or the number of relays is beneficial for the outage probability.
... Results depicted that by increase in the number of antennas at the relay, the spatial diversity and amount of harvested energy can be increased. Authors in [125] suggested a two way multi-antenna CoR system with single antenna at source and destination .Here BER for six relaying schemes as a function of relay antennas, PS ratio and EH time was proposed. ...
Wireless Power Transfer (WPT) is an innovative technology employed for enhancing the energy sustainability of wireless devices with a limited life span. The idea of integrating WPT in wireless communication leads to the idea of Simultaneous Wireless Information and Power Transfer (SWIPT) that transfers information and power to wireless devices simultaneously, thereby resulting in a drastic increase in spectral efficiency of the network. SWIPT aided Cooperative Relaying (CoR) has emerged as a new trend for Fifth Generation (5G) and Beyond 5G (B5G) systems owing to the rapidly increasing challenges faced by these networks. Cooperative relaying combined with SWIPT can be helpful in overcoming the rising demands of next generation wireless networks by providing an enhanced date rate, low latency, shorter coverage, wide spread connectivity of massive number of devices along with energy-efficiency. This article provides a comprehensive review of SWIPT technology that enables the use of CoR networks for 5G and B5G mobile networks including the significance, technologies, and protocols which can be applied. This article also examines the deployment of cooperative SWIPT involving a single relay, multiple relays and optimal relay selection, multi antenna systems and optimal beamforming.SWIPT under the influence of Hardware Impairments (HI), imperfect Channel State Information (CSI), non-linear energy harvesting models, Intelligent Reconfigurable Surface (IRS), massive MIMO, massive access for the Internet of Things (IoT) has been discussed in detail. Meanwhile, this study discusses key challenges being faced in the implementation of SWIPT for future wireless networks that need to be addressed efficiently.
... Today, the development of smart devices has led to the increase in the number of wireless connections, the mobile data rate, and the consumed energy in the next generation of wireless communication systems [1,2]. The users always wants to connect and get the data quickly and safely. ...
In this paper, an underlay cooperative cognitive network using a non-orthogonal multiple access (UCCN-NOMA) system is investigated, in which the intermediate multiple relays help to decode and forward two signals x 1 and x 2 from a source node to two users D1 and D2, respectively, under wiretapping of an eavesdropper (E). We study the best relay selection strategies by three types of relay selection criteria: the first and second best relay selection is based on the maximum channel gain of the links R i -D 1 , R i -D2, respectively; the third one is to ensure a minimum value of the channel gains from the R i -E link. We analyze and evaluate the secrecy performances of the transmissions x 1 and x 2 from the source node to the destination nodes D1, D2, respectively, in the proposed UCCN-NOMA system in terms of the secrecy outage probabilities (SOPs) over Rayleigh fading channels. Simulation and analysis results are presented as follows. The results of the (sum) secrecy outage probability show that proposed scheme can realize the maximal diversity gain. The security of the system is very good when eavesdropper node E is far from the source and cooperative relay. Finally, the theoretical analyses are verified by performing Monte Carlo simulations.
... Furthermore, the study in [15] considered PS protocol, in which the authors tried to optimize their PS ratios and the transmit power to maximize the data rate over multiple coherent time slots. In [16], different two-way relay networks was considered, in which the performance of these considered systems were examined based on PS and TS protocols. In addition, the literature in [17] focused on a symmetric wireless communication network with SWIPT in a K-user multiple-input multiple-output (MIMO) CRN, where PS ratio and power allocation were carefully investigated to guarantee the ideal system performance. ...
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.
n this paper, we have explored the performance of a bidirectional amplify and forward energy harvesting half-duplex multi-relay multi-antenna network system over the Nakagami fading channel. We have proposed the delay limited and delay tolerant transmission modes when simultaneous transfer of energy and information occurs between terminal nodes via a cluster of relay nodes. Mathematical expressions of the outage probability, achievable throughput and the ergodic capacity are proposed, analyzed and illustrated using Monte Carlo simulation. The research result shows the advantage of using multiple antennas in the relay node.
This paper introduces a novel scheme of Maximum Radio Frequency Energy Harvested Antenna Selection in Two-Way Communication via two multi-antenna Relays in the presence of an interferer under eavesdropper attack. The basic objective of our work is to investigate the Secrecy Performance in Two-Way Multi-antenna Relay network with Interference-aided EH using Maximum Harvested Energy Antenna-Selection Scheme. The impact of some network parameters, namely energy harvesting coefficient, Transmit Power of Sources, Interferer Transmit Power, Global Target Secrecy Rate and no of antennas has been examined on the Secrecy capacity. Simulation results demonstrate that our proposed model improves the secrecy performance significantly as compared to its contrast models. Also a trade-off has been observed between secure transmission and reliable communication. Furthermore, these results serve as a criterion for the deployment of maximum number of antennas for two way communication to enhance the Secrecy Capacity.
