Preface
About the Authors
Chapter 1: Fundamentals of Metasurfaces for Wireless Communications
Introduction of Metamaterial and Metasurface
Evolutions of Reconfigurable Intelligent Surface (RIS)-Related Wireless Technologies
- Multi-Antenna Technology
- Coordinated Multi-Point Processing (CoMP)
- Micro/Pico/femto Cells
- Relay
System Performance Requirements for 6G
- Application Scenarios
- Key Performance Indicators
- Basics about Performance Evaluation Methodologies
Chapter 2: Modeling of a RIS for Wireless Communications
Overview of Channel Models for Mobile Communications
- Large-Scale Fading Models
- Small-Scale Fading Models
- Spatial Channel Models
- Simplified Model for Spatial Channels
- Antenna Models and Configurations
Large-Scale Channel Models for a RIS
- Free-Space Pathloss Models for a RIS
- More Realistic Large-Scale Fading Models for RIS
Small-Scale Channel Models for RIS
Electromagnetic Field Modeling of Metasurface Structures
Chapter 3: Designs of Metasurface Devices
Basic Design Principles of Metasurface Devices
- Typical Metamaterials and Devices
- Basic Structures of Metamaterial Devices
- Design Principles of Metasurface
- Active RIS Elements
Simulations and Measurements of Metasurface Devices
- Electromagnetic Simulations
- Performance Testing of Actual Devices
Control of Metasurface Devices
- Non-Ideal Characteristics
- Control Mechanisms of Tunable Metasurface
Codebook Designs of the RIS
- Uniqueness of Codebook Design for the RIS
- Examples of the RIS Codebook Designs
Near-Field Communications
- Near-Field Basics
- Polar Coordinates for the Near-Field
- Beam Squinting in Wideband Operation and Solutions
Metasurface-Based Beamforming at the Base Station
Chapter 4: System Implementations of a RIS for Wireless Communications
Basic System Models and Performances for Metasurface-Based Relay
- System Models
- Theoretical Performance Analysis
- Simplified Model and Performance Analysis
Beamforming Techniques for a RIS
- Beam-Based Techniques
- Random-Sampling-Based Technique
RIS Channel Estimation and Feedback for Small-Scale Fading
Direction Finding Via Time-Space Coding
Link-Level Simulations
- Simulation Parameters and Methodology
- Preliminary Link-Level Simulation Results
System-Level Simulations
- System Configurations and Simulation
- Preliminary Simulation Results
Chapter 5: Standardization and Trials of RIS-Aided Wireless Communications
Overview and Key Features of Relay Technology in Standardization
- Potential Deployment Scenarios
- Basic Categories of an LTE Relay
- Type 1 Relay
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- Type 2 Relay
Brief Discussion on an LTE Full-Dimensional MIMO
Field Trials
- RIS Trial in Nanjing
- RIS Trial in Shenzhen
Standardization Road Map for the RIS
- Lessons Learned from the LTE Era
- Different Modes of Operation for the RIS
- 3GPP Release 18 Network-Controlled Repeater
- Comparison Between Network-Controlled Repeater and RIS
- Future Road Map for RIS Standardization
Index
