Part 1: Massive MIMO Fundamentals

Chapter 1: Why Massive MIMO

Intermediate~240 min

Learning Objectives

  • Explain why increasing the number of base station antennas provides unbounded capacity growth
  • Prove the channel hardening law and explain its operational consequences
  • Define favorable propagation and explain why it makes inter-user interference vanish
  • Argue why simple linear processing (MRC/ZF) becomes near-optimal in the massive regime
  • Explain why TDD reciprocity is the enabling technology for massive MIMO and why FDD faces a fundamental overhead barrier

Sections

Prerequisites & Notation
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Capacity Scaling: Why More Antennas?
Channel Hardening
Favorable Propagation
Linear Processing Near-Optimality
TDD Reciprocity and the FDD Challenge
Chapter Summary
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Exercises
References & Further Reading
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Prerequisites

MIMO basics: channel matrix, SVD, spatial multiplexing (Telecom Ch. 15–18)Multi-user MIMO: uplink/downlink system model (ITA Ch. 13–16)Channel estimation fundamentals (FSI Ch. 7, 12)Linear algebra: SVD, trace inequalities, law of large numbersRandom matrix theory basics: Marchenko–Pastur law (Telecom Ch. 18)

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