Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6260
Title: Simultaneous information-and-power transfer for broadband downlink sytems
Authors: Huang, K
Larsson, EG
Keywords: Power transmission
Cellular networks
Power control
Energy harvesting
Mobile communication
Issue Date: 2013
Publisher: IEEE
Source: 2013 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) : proceedings, May 26–31, 2013, Vancouver Convention Center, Vancouver, British Columbia, Canada, p.4444-4448 How to cite?
Abstract: Far-field wireless recharging based on microwave power transfer (MPT) will free mobile devices from interruption due to finite battery lives. Integrating MPT with wireless communications to support simultaneous information-and-power transfer (SIPT) allows the same spectrum to be used for dual purposes without compromising the quality of service. In this paper, we propose the novel approach of realizing SIPT in a broadband downlink system where users are assigned orthogonal frequency sub-channels and a base station transfers information and energy to users over spatially separated channels called the data and MPT channels. Optimizing the power control for such a system results in a new class of multiuser power-control problems featuring the circuit-power constraints, namely that the wirelessly transferred power must be sufficiently large for operating receiver circuits. Solving these problems gives a set of power-control algorithms that exploit channel diversity in frequency for simultaneously enhancing the throughput and MPT efficiency. For the single-user SIPT system, the optimal power allocation is shown to perform water filling in frequency with water levels for different users depending on the corresponding MPT sub-channel gains. Next, an efficient power-control algorithm is proposed for the multiuser SIPT system based on sequential scheduling of mobiles by comparing their data rates and circuit-power constraints. This algorithm is proved to be optimal for the practical scenario of highly correlated data and MPT channels.
URI: http://hdl.handle.net/10397/6260
ISSN: 1520-6149
DOI: 10.1109/ICASSP.2013.6638500
Rights: © 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
The following article "Huang, K. & Larsson, E.G. (2013), Simultaneous information-and-power transfer for broadband downlink sytems. In 2013 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) : proceedings, (pp.4444,4448). doi: 10.1109/ICASSP.2013.6638500" is available at http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6638500&isnumber=6637585
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