Two-way relaying networks in green communications for 5G: Optimal throughput and tradeoff between relay distance on power splitting-based and time switching-based relaying SWIPT

2016 ◽  
Vol 70 (12) ◽  
pp. 1637-1644 ◽  
Author(s):  
Hoang-Sy Nguyen ◽  
Dinh-Thuan Do ◽  
Miroslav Voznak
Keyword(s):  
Power Splitting ◽  
Green Communications ◽  
Time Switching ◽  
Relaying Networks

scholarly journals Joint Source and Relay Beamforming Design in Wireless Multi-Hop Sensor Networks with SWIPT

Sensors ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 182 ◽  
Author(s):  
Xiaoqing Liu ◽  
Zhigang Wen ◽  
Dan Liu ◽  
Junwei Zou ◽  
Shan Li
Keyword(s):  
Energy Harvesting ◽  
Multiple Input Multiple Output ◽  
The Other ◽  
Achievable Rate ◽  
Power Splitting ◽  
Amplify And Forward ◽  
Time Switching ◽  
Multiple Input ◽  
Convex Problem ◽  
Input Multiple Output

We consider a multiple-input multiple-output amplify-and-forward wireless multiple-hop sensor network (WMSN). The simultaneous wireless information and power transfer technology is deployed to potentially achieve an autonomous system. We investigate two practical receiver schemes, which are the power splitting (PS) and the time switching (TS). The power splitting receiver splits received signals into two streams, one for information decoding (ID) and the other for energy harvesting (EH). On the other hand, the time switching receiver only serves in ID mode or energy harvesting mode during a certain time slot. Subject to transmit power constraints and destination harvested energy constraint, we aim to obtain a joint beam-forming solution of source and relay precoders to maximize the maximum achievable rate of the WSN. In order to make the non-convex problem tractable, diagonalization-based alternating optimization algorithms are proposed. Numerical results show the convergence and good performance of the proposed algorithms under both PS and TS protocols.

scholarly journals Beamforming Design for Wireless Information and Power Transfer Systems: Receive Power-Splitting Versus Transmit Time-Switching

2017 ◽  
Vol 65 (2) ◽  
pp. 876-889 ◽  
Author(s):  
Ali Arshad Nasir ◽  
Hoang Duong Tuan ◽  
Duy Trong Ngo ◽  
Trung Q. Duong ◽  
H. Vincent Poor
Keyword(s):  
Power Splitting ◽  
Power Transfer ◽  
Time Switching ◽  
Receive Power

scholarly journals AN-Aided Secure Beamforming in Power-Splitting-Enabled SWIPT MIMO Heterogeneous Wireless Sensor Networks

Electronics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 459 ◽  
Author(s):  
Weili Ge ◽  
Zhengyu Zhu ◽  
Wanming Hao ◽  
Yi Wang ◽  
Zhongyong Wang ◽  
...  
Keyword(s):  
Optimal Solution ◽  
Taylor Series Expansion ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Artificial Noise ◽  
Power Splitting ◽  
Green Communications ◽  
Convex Approximation ◽  
Heterogeneous Wireless Sensor Networks ◽  
Heterogeneous Wireless Sensor Network

In this paper, we investigate the physical layer security in a two-tier heterogeneous wireless sensor network (HWSN) depending on simultaneous wireless information and power transfer (SWIPT) approach for multiuser multiple-input multiple-output wiretap channels with artificial noise (AN) transmission, where a more general system framework of HWSN only includes a macrocell and a femtocell. For the sake of implementing security enhancement and green communications, the joint optimization problem of the secure beamforming vector at the macrocell and femtocell, the AN vector, and the power splitting ratio is modeled to maximize the minimal secrecy capacity of the wiretapped macrocell sensor nodes (M-SNs) while considering the fairness among multiple M-SNs. To reduce the performance loss of the rank relaxation from the SDR technique while solving the non-convex max–min program, we apply successive convex approximation (SCA) technique, first-order Taylor series expansion and sequential parametric convex approximation (SPCA) approach to transform the max–min program to a second order cone programming (SOCP) problem to iterate to a near-optimal solution. In addition, we propose a novel SCA-SPCA-based iterative algorithm while its convergence property is proved. The simulation shows that our SCA-SPCA-based method outperforms the conventional methods.

scholarly journals Throughput Characterization for Cooperative Wireless Information Transmission with RF Energy Harvesting-Based Relay

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Yuanyuan Yao ◽  
Changchuan Yin ◽  
Sai Huang
Keyword(s):  
Information Transmission ◽  
Cooperative Relaying ◽  
Network Throughput ◽  
Transmission Mode ◽  
Destination Node ◽  
Power Splitting ◽  
Power Transfer ◽  
Time Switching ◽  
Transmission Modes ◽  
Rf Energy

The simultaneous wireless information and power transfer (SWIPT) in a cooperative relaying system is investigated, where the relay node is self-sustained by harvesting radiofrequency (RF) energy from the source node. In this paper, we propose a time switching and power splitting (TSPS) protocol for the cooperative system with a mobile destination node. In the first part of the transmission slot, a portion of the received signal power is used for energy transfer, and the remaining power is used for information transmission from the source to the relay. For the remaining time of the transmission slot, information is transmitted from the relay to a mobile destination node. To coordinate the wireless information and power transfer, two transmission modes are investigated, namely, relay-assisted transmission mode and nonrelay mode, respectively. Under these two modes, the outage probability and the network throughput are characterized. By joint optimization of the power splitting and the time switching ratios, we further compare the network throughput under the two transmission modes with different parameters. Results indicate that the relay-assisted transmission mode significantly improves the throughput of the wireless network.

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