Part 2: Multi-User MIMO: Precoding and Detection
Chapter 10: Massive MIMO-OFDM
Advanced~210 min
Learning Objectives
- Model the wideband massive MIMO-OFDM channel and explain the per-subcarrier flat-fading decomposition
- Design pilot patterns in the OFDM time-frequency grid that balance estimation accuracy against overhead
- Apply interpolation-based channel estimation to reduce pilot density below one pilot per subcarrier
- Analyze per-subcarrier SINR for MRT, ZF, and MMSE precoding in the wideband regime
- Describe 5G NR massive MIMO features: Type I/II CSI-RS, multi-panel codebooks, and SRS-based reciprocity
Sections
Prerequisites
OFDM fundamentals: cyclic prefix, DFT/IDFT, inter-carrier interference (Telecom Ch. 24)Channel estimation: LS and MMSE estimation, pilot contamination (MIMO Ch. 3)Linear precoding: MRT, ZF, MMSE in narrowband massive MIMO (MIMO Ch. 6)Uplink detection: MRC, ZF, MMSE-SIC (MIMO Ch. 9)Frequency-selective fading: delay spread, coherence bandwidth (Telecom Ch. 10)
💬 Discussion
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