Intro
Preface
Contents
Acronyms
1 Fundamentals of IRS
1.1 Research Background of IRS
1.2 What Is New?
1.3 IRS Signal and Channel Model
1.4 IRS Hardware Architecture and Practical Constraints
1.4.1 IRS Hardware Architecture
1.4.2 Discrete Reflection Amplitude and Phase Shift
1.4.3 Coupled Reflection Amplitude and Phase Shift
References
2 A Framework General Design for IRS-Aided WPT
2.1 Introduction
2.1.1 Wireless Power Transfer (WPT)
2.1.2 IRS-Aided WPT
2.2 Joint Active and Passive Energy Beamforming

2.2.1 System Model and Problem Formulation
2.2.2 Proposed Solution
2.2.3 Performance Evaluation
2.2.4 Discussion
2.3 Channel Acquisition
2.3.1 Channel Acquisition in WPT Systems without IRS
2.3.2 Channel Acquisition in IRS-Aided WIT Systems
2.3.3 Efficient Channel Acquisition for IRS-AidedWPT Systems
2.3.4 Discussion
2.4 Dynamic IRS Beamforming Design
2.4.1 Motivation
2.4.2 System Model and Problem Formulation
2.4.3 Proposed Solution
2.4.3.1 WPT with Static IRS Beamforming
2.4.3.2 Dynamic IRS Beamforming
2.4.3.3 TDMA-Based IRS Beamforming

2.4.3.4 Complexity and Convergence Analysis
2.4.4 Performance Evaluation
References
3 IRS-Aided SWIPT
3.1 Introduction
3.2 IRS-Aided SWIPT for Weighted Sum Power Maximization
3.2.1 System Model and Problem Formulation
3.2.2 Proposed Solution
3.2.3 Performance Evaluation
3.2.3.1 IRS-Aided WPT
3.2.3.2 IRS-Aided SWIPT
3.3 IRS-Aided SWIPT Under QoS Constraints
3.3.1 System Model and Problem Formulation
3.3.2 Proposed Penalty-Based Algorithm
3.3.2.1 Problem Reformulation for Decoupling QoS Constraints

3.3.2.2 Inner Layer: Block Coordinate Descent Algorithm for Solving (P3)
3.3.2.3 Outer Layer: Update Penalty Coefficient
3.3.2.4 Convergence Analysis and Computational Complexity
3.3.3 Alternative Low-Complexity Algorithm
3.3.4 Performance Evaluation
3.3.4.1 Convergence of Algorithm 1
3.3.4.2 AP Transmit Power Versus Number of Reflecting Elements
3.3.4.3 AP Transmit Power Versus RF Receive Power Target at EUs
3.3.4.4 AP Transmit Power Versus Number of IUs
3.3.4.5 AP Transmit Power Versus QoS Ratio
Appendix: Proof of Proposition 3.1
References
4 IRS-Aided WPCN

4.1 Introduction
4.2 IRS-Aided HD WPCN
4.2.1 System Model and Problem Formulation
4.2.1.1 Dynamic IRS Beamforming for DL WPT and UL WIT
4.2.1.2 Problem Formulations
4.2.1.3 Impact of Dynamic IRS Beamforming
4.2.2 Proposed Algorithms
4.2.2.1 Proposed Algorithm for (P1)
4.2.2.2 Proposed Algorithm for (P3)
4.2.3 Dynamic IRS Beamforming for WPCN
4.2.3.1 General Transmission Protocol and Problem Formulation
4.2.3.2 Proposed Generic Joint Optimization Algorithm
4.2.3.3 Proposed Generic Low-Complexity Algorithm
4.2.3.4 Complexity Analysis