Optimal time switching and power splitting in SWIPT

2016 ◽  
Author(s):  
Furqan Jameel ◽  
Asif Ali ◽  
Rasheed Khan
Keyword(s):  
Optimal Time ◽  
Power Splitting ◽  
Time Switching

scholarly journals Joint design of beamforming and time switching/power splitting for wireless-powered multi-antenna dual-relay network

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Guojie Hu ◽  
Yueming Cai ◽  
Liang Ao ◽  
Xiangdong Wang
Keyword(s):  
Superior Performance ◽  
Relay Network ◽  
Sequential Optimization ◽  
Optimal Time ◽  
Optimization Approach ◽  
Power Splitting ◽  
Time Switching ◽  
Joint Design ◽  
Single Antenna ◽  
Energy Constrained

Abstract In this paper, we consider a wireless-powered dual-relay network consisting of one multi-antenna source, two single-antenna energy-constrained relays and one single-antenna destination without direct source to destination link. In order to establish the communication flow, the energy-constrained relays harvest energy from the radio frequency transmitted by the source firstly, then exploit the harvested energy to forward the source information to the destination based on distributed space time coding (DSTC). Under this network architecture, three decode-and-forward (DF) technique-based relaying protocols, i.e., time switching-based relaying (TSR) protocol, power splitting-based relaying (PSR) protocol, and hybrid relaying (HR) protocol, are considered to drive the energy transfer and information transmission. To maximize the network throughput, the joint design for the optimal energy and information beamforming vectors employed at the source, the optimal time switching, and power splitting ratios under these three protocols are investigated and solved efficiently by employing simple sequential optimization approach or alternating optimization approach. Simulations are conducted to show the superior performance achieved by our proposed scheme. Moreover, we find that the TSR protocol outperforms the PSR protocol in the low signal-to-noise ratio (SNR) region, while the latter outperforms the former in the high SNR region. And the HR protocol achieves the best performance in any SNR region. At the same time, the effect of the relays’ locations on the throughput performance of these three protocols is also investigated.

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.

Optimal time switching control for multi-reaction batch process

2009 ◽  
Vol 31 (4) ◽  
pp. 289-301 ◽  
Author(s):  
D. Mazouni ◽  
J. Harmand ◽  
A. Rapaport ◽  
H. Hammouri
Keyword(s):  
Batch Process ◽  
Switching Control ◽  
Optimal Time ◽  
Time Switching

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 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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