- Title
- Beamforming design for wireless information and power transfer systems: receive power-splitting versus transmit time-switching
- Creator
- Nasir, Ali Arshad; Tuan, Hoang Duong; Ngo, Duy Trong; Duong, Trung Q.; Poor, H. Vincent
- Relation
- IEEE Transactions on Communications Vol. 65, Issue 2, p. 876-889
- Publisher Link
- http://dx.doi.org/10.1109/TCOMM.2016.2631465
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2017
- Description
- Information and energy can be transferred over the same radio-frequency channel. In the power-splitting (PS) mode, they are simultaneously transmitted using the same signal by the base station (BS) and later separated at the user (UE)'s receiver by a power splitter. In the time-switching (TS) mode, they are either transmitted separately in time by the BS or received separately in time by the UE. In this paper, the BS transmit beamformers are jointly designed with either the receive PS ratios or the transmit TS ratios in a multicell network that implements wireless information and power transfer (WIPT). Imposing UE-harvested energy constraints, the design objectives include: 1) maximizing the minimum UE rate under the BS transmit power constraint, and 2) minimizing the maximum BS transmit power under the UE data rate constraint. New iterative algorithms of low computational complexity are proposed to efficiently solve the formulated difficult nonconvex optimization problems, where each iteration either solves one simple convex quadratic program or one simple second-order-cone-program. Simulation results show that these algorithms converge quickly after only a few iterations. Notably, the transmit TS-based WIPT system is not only more easily implemented but outperforms the receive PS-based WIPT system as it better exploits the beamforming design at the transmitter side.
- Subject
- energy harvesting; power splitting; quadratic programming; second-order cone programming; time switching; transmit beamforming; WIPT
- Identifier
- http://hdl.handle.net/1959.13/1396870
- Identifier
- uon:34142
- Identifier
- ISSN:0090-6778
- Rights
- © 2017 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.
- Language
- eng
- Full Text
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