Part 2: Beamforming Optimization

Chapter 7: Multi-User RIS-Aided Systems

Advanced~220 min

Learning Objectives

  • Formulate RIS-aided MU-MIMO sum-rate and max-min-rate problems
  • Extend AO+WMMSE to the multi-user case with passive-beamforming sub-problem
  • Derive the max-min formulation as an SOCP with bisection on the common SINR target
  • Interpret how the RIS mediates the sum-rate / fairness tradeoff by reshaping per-user channels
  • Quantify the asymptotic KK-user scaling: fairness, DoF, and coherent RIS gain

Sections

Prerequisites & Notation
nextSpecial
The Multi-User RIS Signal Model
Sum-Rate Maximization via WMMSE
Max-Min Fairness and the SOCP Formulation
Active–Passive Interplay and Operating Points
Chapter Summary
Special
Exercises
References & Further Reading
Special

Prerequisites

Chapter 5: joint active-passive beamforming and AOChapter 6: SDR, manifold, element-wise phase optimizationMU-MIMO broadcast channel and precoding (MIMO Ch. 6, Telecom Ch. 17)WMMSE algorithm for sum-rate maximizationMax-min fairness and bisection over SINR targets

💬 Discussion

Loading discussions...