Wireless energy harvesting in cooperative decode-and-forward relaying networks over mixed generalizedη-μandκ-μfading channels

2017 ◽  
Vol 29 (2) ◽  
pp. e3262 ◽  
Author(s):  
Osamah S. Badarneh ◽  
Fares S. Almehmadi ◽  
Imran Shafique Ansari ◽  
Xiaodong Yang
Keyword(s):  
Energy Harvesting ◽  
Decode And Forward ◽  
Relaying Networks ◽  
Wireless Energy Harvesting

scholarly journals Subcarrier Allocation Based Cooperative Spectrum Sharing with Wireless Energy Harvesting in OFDM Relaying Networks

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2663
Author(s):  
Dan Huang ◽  
Mengshu Hou ◽  
Weidang Lu
Keyword(s):  
Energy Harvesting ◽  
Spectrum Sharing ◽  
Transmission Rate ◽  
Relay Node ◽  
Cognitive System ◽  
Subcarrier Allocation ◽  
Cooperative Spectrum Sharing ◽  
Simulation Results ◽  
Relaying Networks ◽  
Wireless Energy Harvesting

In this paper, we propose subcarrier allocation based cooperative spectrum sharing protocol for OFDM relaying networks with wireless energy harvesting. In the proposed protocol, the cognitive relay node utilizes different subcarriers to forward the primary information to obtain the spectrum access for the cognitive system transmission. The primary system consists of two parts, a primary transmitter (PT) and primary receiver (PR), and cognitive system includes a cognitive source node (CSN), cognitive destination node (CDN) and cognitive relay node (CRN). In the first phase, CRN splits a fraction of the power received from the PT and CSN transmission to decode information, while the remaining power is used for energy harvesting. Then CRN uses disjoint subcarriers to forward the signals of PT and CSN by utilizing the harvested energy in the second phase. Three parameters which consist of power splitting ratio, power allocation and subcarriers allocation are optimized in our algorithm to maximize the cognitive transmission rate with the constraint of primary target transmission rate. Numerical and simulation results are shown to give useful insights into the proposed cooperative spectrum sharing protocol, and we also found that various system parameters have a great effect for the simulation results.

Wirelessly Energy Harvesting DF Dual-hop Relaying Networks: Optimal Time Splitting Ratio and Performance Analysis

2017 ◽  
Vol 3 (2) ◽  
pp. 16
Author(s):  
Tran Thien Thanh ◽  
Vo Nguyen Quoc Bao
Keyword(s):  
Energy Harvesting ◽  
System Capacity ◽  
Closed Form Expression ◽  
Optimal Time ◽  
High Signal ◽  
Splitting Ratio ◽  
Time Splitting ◽  
Relaying Networks ◽  
And Performance ◽  
Wireless Energy Harvesting

This paper is to derive the optimal time splitting ratio for wireless energy harvesting DF dua-hop relaying networks. Using the partial relay selection, the best relay having the largest harvesting energy is chosen to be the forward for the second hop. We also derive the closed form expression for the optimal time splitting ratio that maximizes the system instantaneous capacity. Numerical results have shown that the system with the optimal time splitting ratio can significantly  improve instantaneous and ergodic system capacity at high signal-to-noise ratios for the same channel and system settings.

scholarly journals Dynamic Wireless Energy Harvesting and Optimal Distribution in Multipair DF Relay Network with Nonlinear Energy Conversion Model

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Syed Tariq Shah ◽  
Daniel B. da Costa ◽  
Kae Won Choi ◽  
Min Young Chung
Keyword(s):  
Energy Harvesting ◽  
Energy Conversion ◽  
Relay Network ◽  
Power Splitting ◽  
Decode And Forward ◽  
Conversion Model ◽  
Transmission Modes ◽  
Energy Constrained ◽  
Wireless Energy Harvesting ◽  
Nonlinear Energy

Wireless energy harvesting has emerged as an efficient solution to prolong the lifetime of wireless networks composed of energy-constrained nodes. In this paper, we consider a multipoint-to-multipoint relay network, where multiple source nodes communicate with their respective destination nodes via intermediate energy-constrained decode-and-forward (DF) relay. The performance of two different transmission modes, namely, delay tolerant and delay nontolerant, is studied. Based on power-splitting relaying protocol (PSR), optimal energy harvesting and distribution schemes for both transmission modes are provided. In addition, for more realistic and practical analysis, we consider a nonlinear energy conversion model for energy harvesting at the relay node. Our numerical results provide useful insights into different system parameters of a nonlinear energy harvesting-based multipair DF relay network.

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