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Wireless Energy and Information Transfer Tradeoff for Limited-Feedback Multiantenna Systems With Energy Beamforming
- Source :
- IEEE Transactions on Vehicular Technology. 63:407-412
- Publication Year :
- 2014
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2014.
-
Abstract
- In this paper, we consider a multiantenna system where the receiver should harvest energy from the transmitter by wireless energy transfer to support its wireless information transmission. To maximize the harvesting energy, we propose the performance of adaptive energy beamforming according to the instantaneous channel state information (CSI). To help the transmitter obtain the CSI for energy beamforming, we further propose a win-win CSI quantization feedback strategy to improve the efficiencies of both power and information transmission. The focus of this paper is on the tradeoff of wireless energy and information transfer by adjusting the transfer duration with a total duration constraint. By revealing the relationship between transmit power, transfer duration, and feedback amount, we derive two wireless energy and information transfer tradeoff schemes by maximizing an upper bound and an approximate lower bound of the average information transmission rate, respectively. Moreover, the impact of imperfect CSI at the receiver is investigated, and the corresponding wireless energy and information transfer tradeoff scheme is also given. Finally, numerical results validate the effectiveness of the proposed schemes.
- Subjects :
- Beamforming
Engineering
Information transfer
Computer Networks and Communications
business.industry
ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS
Transmitter
Aerospace Engineering
Data_CODINGANDINFORMATIONTHEORY
Transmitter power output
Upper and lower bounds
Channel state information
Automotive Engineering
Electronic engineering
Wireless
Electrical and Electronic Engineering
business
Energy harvesting
Computer Science::Information Theory
Subjects
Details
- ISSN :
- 19399359 and 00189545
- Volume :
- 63
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Vehicular Technology
- Accession number :
- edsair.doi...........e8490142634f5f4ec704ee5bda3792bb