Imperial College London
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ProfessorBrunoClerckx

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor of Wireless Communications and Signal Processing
 
 
 
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Contact

 

+44 (0)20 7594 6234b.clerckx Website

 
 
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Location

 

816Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhao:2022:10.1109/TCOMM.2021.3129931,
author = {Zhao, Y and Clerckx, B and Feng, Z},
doi = {10.1109/TCOMM.2021.3129931},
journal = {IEEE Transactions on Wireless Communications},
pages = {1345--1359},
title = {IRS-aided SWIPT: Joint waveform, active and passive beamforming design under nonlinear harvester model},
url = {http://dx.doi.org/10.1109/TCOMM.2021.3129931},
volume = {70},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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.
AU  - Zhao,Y
AU  - Clerckx,B
AU  - Feng,Z
DO  - 10.1109/TCOMM.2021.3129931
EP  - 1359
PY  - 2022///
SN  - 1536-1276
SP  - 1345
TI  - IRS-aided SWIPT: Joint waveform, active and passive beamforming design under nonlinear harvester model
T2  - IEEE Transactions on Wireless Communications
UR  - http://dx.doi.org/10.1109/TCOMM.2021.3129931
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000756827000049&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - http://hdl.handle.net/10044/1/101339
VL  - 70
ER  -
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