NDLI: Time allocation optimisation for multi-antenna wireless information and power transfer with training and feedback

Content Provider	IET Digital Library
Author	Wu, Yating Wang, Tao Sun, Yanzan Xu, Chongbin
Abstract	Time allocation optimisation for a multi-antenna wireless energy and information transfer system is studied in this study. The terminal first harvests the wireless energy from the base station (BS) during phase I, and then uses the harvested energy to power its information transmission during phase II. Realistic channel state information (CSI) assumptions are made where the CSI at the BS is obtained via training and feedback and is subject to channel estimation error and quantisation error. Therefore, in addition to the tradeoff between information and power transfer, there is also a tradeoff in determining the overheads of training and feedback. To gain insight into this problem, the authors characterise the asymptotic behaviour of the parameters in the large system limit where the number of transmit antennas N t and transmission block length L tot tend to infinity with fixed ratio L tot/N t. The optimal overheads of training and feedback within each phase are first derived to maximise the harvested power and the information transmission rate, respectively. The optimised time allocation between phase I and phase II is then obtained by maximising the bounds of the effective average information transmission rate. Finally, numerical results are presented to verify the proposed theorems.
Starting Page	414
Ending Page	420
Page Count	7
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 3, Feb (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.0425
Journal	IET Communications
Publisher Date	2017-02-16
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Array Base Station Channel Estimation Error Channel State Information CSI Energy Harvesting Information Transmission Multiantenna Wireless Information Transfer Multiantenna Wireless Power Transfer Optimal Overheads Optimisation Optimisation Technique Quantisation Error Radio Frequency Power Transmission Radio Link And Equipment Time Allocation Optimisation Transmission Block Length Transmit Antenna Transmitting Antenna Wireless Channel Wireless Energy Harvesting
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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