Chapter 22: Massive MIMO in 5G NR

Learning Objectives

• Describe the 5G NR frame structure at numerologies $\mu \in \{0,1,2,3,4\}$ and compute the slot duration, subcarrier spacing, and symbol budget for FR1 and FR2 carriers
• Distinguish NZP-CSI-RS, ZP-CSI-RS, and SRS pilots and compute their overhead as a function of CSI-RS ports, periodicity, and coherence block length
• Contrast Type I (DFT-based single-panel) and Type II (linear combination of DFT beams) codebooks and quantify their feedback overhead vs achievable rate trade-off
• Specify the SSB-based P1/P2/P3 beam management procedures and compute the beam-sweep latency for a given number of beams and slot budget
• Compare coherent-joint-transmission (CJT), non-coherent-joint-transmission (NCJT), and SDM/FDM/TDM schemes for multi-TRP operation, and explain their phase-coherence requirements
• Interpret field-trial results from 64T64R and 128T128R massive MIMO deployments and identify the practical-versus-theoretical gap introduced by mobility, scheduling, and CSI ageing