DocumentCode :
702585
Title :
Feedback rate optimization in receiver-coordinated distributed transmit beamforming for wireless power transfer
Author :
Rui Wang ; David, Radu ; Brown, D. Richard
Author_Institution :
Dept. of Electr. & Comput. Eng., Worcester Polytech. Inst., Worcester, MA, USA
fYear :
2015
fDate :
18-20 March 2015
Firstpage :
1
Lastpage :
6
Abstract :
This paper considers the combination of receiver-coordinated distributed transmit beamforming with wireless power transfer in a narrowband wireless communication system. A single receiver measures the channel states of two or more independent transmit nodes and provides feedback to the transmitters to facilitate beamforming and passband signal alignment at the receiver. The receive node is equipped with energy harvesting and storage devices which can harvest and store the beamforming energy for future utilization. Since feedback improves the beamforming gain but requires the receiver to expend energy, there is an inherent tradeoff between the feedback rate and the efficiency of the energy harvesting at the receiver. This paper analyzes the optimal feedback rate to maximize the amount of energy harvested by the receive node per unit of time. Analysis shows that there always exists a unique optimal feedback rate for the system. Numerical results are also provided to confirm the analysis and demonstrate the effect of the feedback rate on the mean energy harvesting rate.
Keywords :
array signal processing; energy harvesting; energy storage; feedback; inductive power transmission; optimisation; radio receivers; radio transmitters; telecommunication power management; beamforming energy; beamforming gain; channel states; energy harvesting rate; feedback rate optimization; narrowband wireless communication system; optimal feedback rate; passband signal alignment; receive node; receiver-coordinated distributed transmit beamforming; storage devices; transmit nodes; wireless power transfer; Antenna measurements; Area measurement; Gain measurement; Noise; Time measurement; Wireless communication; Wireless sensor networks; channel state feedback; distributed beamforming; synchronization; wireless power transfer;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Sciences and Systems (CISS), 2015 49th Annual Conference on
Conference_Location :
Baltimore, MD
Type :
conf
DOI :
10.1109/CISS.2015.7086865
Filename :
7086865
Link To Document :
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