Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/626337
Title: Cognitive Relay Networks With Energy Harvesting and Information Transfer: Design, Analysis, and Optimization
Authors: Zihao Wang;Zhiyong Chen;Bin Xia;Ling Luo;Jian Zhou
subject: energy harvesting|outage probability|Cognitive relay network|joint optimization|biconvex
Year: 2016
Publisher: IEEE
Abstract: In this paper, a wireless energy harvesting and information transfer protocol in cognitive relay networks is investigated, where an energy harvesting secondary network shares the spectrum as well as harvests energy by assisting the primary transmission. Specifically, a secondary transmitter scavenges energy from the received primary signal and then employs the harvested energy to forward the resulting signals along with the secondary signal. The secondary receiver can also harvest the ambient energy, and use the remaining signal to cancel the primary interference. We analytically derive the exact expressions of the outage probabilities for both primary and secondary networks. The rate-energy tradeoff between the ergodic capacity and harvested energy in the secondary network is also discussed. Furthermore, to quantify the energy consumption, we investigate the system energy efficiency. Moreover, we address the optimization power allocation strategy under three performance criteria and theoretically prove that the resulting nonconvex optimization problems can be converted into biconvex problems. The corresponding effective algorithms are then developed to solve the optimization problems. Numerical results show that the proposed protocol not only achieves both the primary and secondary transmissions but also harvests the ambient energy.
Description: 
URI: http://localhost/handle/Hannan/162053
http://localhost/handle/Hannan/626337
ISSN: 1536-1276
volume: 15
issue: 4
Appears in Collections:2016

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Title: Cognitive Relay Networks With Energy Harvesting and Information Transfer: Design, Analysis, and Optimization
Authors: Zihao Wang;Zhiyong Chen;Bin Xia;Ling Luo;Jian Zhou
subject: energy harvesting|outage probability|Cognitive relay network|joint optimization|biconvex
Year: 2016
Publisher: IEEE
Abstract: In this paper, a wireless energy harvesting and information transfer protocol in cognitive relay networks is investigated, where an energy harvesting secondary network shares the spectrum as well as harvests energy by assisting the primary transmission. Specifically, a secondary transmitter scavenges energy from the received primary signal and then employs the harvested energy to forward the resulting signals along with the secondary signal. The secondary receiver can also harvest the ambient energy, and use the remaining signal to cancel the primary interference. We analytically derive the exact expressions of the outage probabilities for both primary and secondary networks. The rate-energy tradeoff between the ergodic capacity and harvested energy in the secondary network is also discussed. Furthermore, to quantify the energy consumption, we investigate the system energy efficiency. Moreover, we address the optimization power allocation strategy under three performance criteria and theoretically prove that the resulting nonconvex optimization problems can be converted into biconvex problems. The corresponding effective algorithms are then developed to solve the optimization problems. Numerical results show that the proposed protocol not only achieves both the primary and secondary transmissions but also harvests the ambient energy.
Description: 
URI: http://localhost/handle/Hannan/162053
http://localhost/handle/Hannan/626337
ISSN: 1536-1276
volume: 15
issue: 4
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7342976.pdf6.21 MBAdobe PDFThumbnail
Preview File
Title: Cognitive Relay Networks With Energy Harvesting and Information Transfer: Design, Analysis, and Optimization
Authors: Zihao Wang;Zhiyong Chen;Bin Xia;Ling Luo;Jian Zhou
subject: energy harvesting|outage probability|Cognitive relay network|joint optimization|biconvex
Year: 2016
Publisher: IEEE
Abstract: In this paper, a wireless energy harvesting and information transfer protocol in cognitive relay networks is investigated, where an energy harvesting secondary network shares the spectrum as well as harvests energy by assisting the primary transmission. Specifically, a secondary transmitter scavenges energy from the received primary signal and then employs the harvested energy to forward the resulting signals along with the secondary signal. The secondary receiver can also harvest the ambient energy, and use the remaining signal to cancel the primary interference. We analytically derive the exact expressions of the outage probabilities for both primary and secondary networks. The rate-energy tradeoff between the ergodic capacity and harvested energy in the secondary network is also discussed. Furthermore, to quantify the energy consumption, we investigate the system energy efficiency. Moreover, we address the optimization power allocation strategy under three performance criteria and theoretically prove that the resulting nonconvex optimization problems can be converted into biconvex problems. The corresponding effective algorithms are then developed to solve the optimization problems. Numerical results show that the proposed protocol not only achieves both the primary and secondary transmissions but also harvests the ambient energy.
Description: 
URI: http://localhost/handle/Hannan/162053
http://localhost/handle/Hannan/626337
ISSN: 1536-1276
volume: 15
issue: 4
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7342976.pdf6.21 MBAdobe PDFThumbnail
Preview File