IRS-aided SWIPT: Joint waveform, active and passive beamforming design under nonlinear harvester model
File(s)
Accepted version
Author(s)
Zhao, Yang
Clerckx, Bruno
Feng, Zhenyuan
Type
Journal Article
Abstract
The performance of Simultaneous Wireless Information and Power Transfer (SWIPT) is mainly constrained by the received Radio-Frequency (RF) signal strength. To tackle this problem, we introduce an Intelligent Reflecting Surface (IRS) to compensate the propagation loss and boost the transmission efficiency. This paper proposes a novel IRS-aided SWIPT system where a multi-carrier multi-antenna Access Point (AP) transmits information and power simultaneously, with the assist of an IRS, to a single-antenna User Equipment (UE) employing practical receiving schemes. Considering harvester nonlinearity, we characterize the achievable Rate-Energy (R-E) region through a joint optimization of waveform, active and passive beamforming based on the Channel State Information at the Transmitter (CSIT). This problem is solved by the Block Coordinate Descent (BCD) method, where we obtain the active precoder in closed form, the passive beamforming by the Successive Convex Approximation (SCA) approach, and the waveform amplitude by the Geometric Programming (GP) technique. To facilitate practical implementation, we also propose a low-complexity design based on closed-form adaptive waveform schemes. Simulation results demonstrate the proposed algorithms bring considerable R-E gains with robustness to CSIT inaccuracy and finite IRS states, and emphasize the importance of modeling harvester nonlinearity in the IRS-aided SWIPT design.
Date Issued
2022-02-01
Date Acceptance
2021-11-11
Citation
IEEE Transactions on Wireless Communications, 2022, 70 (2), pp.1345-1359
ISSN
1536-1276
Publisher
Institute of Electrical and Electronics Engineers
Start Page
1345
End Page
1359
Journal / Book Title
IEEE Transactions on Wireless Communications
Volume
70
Issue
2
Copyright Statement
© 2021 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.
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000756827000049&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Telecommunications
Engineering
Array signal processing
Surface waves
Signal to noise ratio
Radio frequency
Adaptation models
Shape
Resource management
Simultaneous wireless information and power transfer
intelligent reflecting surface
waveform design
beamforming design
energy harvester nonlinearity
INTELLIGENT REFLECTING SURFACE
WIRELESS POWER TRANSFER
INFORMATION
OPTIMIZATION
ARCHITECTURE
CHANNELS
NETWORK
Publication Status
Published
Date Publish Online
2021-11-22