Part 3: Advanced RIS Architectures

Chapter 12: Multi-RIS and RIS-Aided Cell-Free

Advanced~220 min

Learning Objectives

  • Formulate multi-RIS system models with cooperative passive beamforming
  • Derive the double-RIS cascaded channel and quantify its gain over single RIS
  • Extend the AO framework to multi-RIS joint optimization
  • Describe the RIS-aided cell-free massive MIMO architecture
  • Compare multi-panel RIS, double-RIS, and cell-free deployments by use case

Sections

Prerequisites & Notation
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Multi-RIS System Model
Double-RIS: Signal Bounces Between Two Panels
RIS-Aided Cell-Free Massive MIMO
Deployment Optimization and Coverage
Chapter Summary
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Exercises
References & Further Reading
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Prerequisites

Chapters 5–11: RIS optimization framework and architecturesCell-free massive MIMO fundamentals (MIMO Ch. 11–12)Distributed beamforming and AP cooperationPower allocation across distributed resourcesStochastic geometry for network analysis

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