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PHY Knowledge Hub

Physical layer. Quantized.
Machine-learned. Future-proof.

A technical knowledge base for PHY layer engineers — covering 5G/6G physical layer internals, quantum communications, ML-driven air interface design, non-terrestrial networks, and ISAC. Built for depth, not breadth.

5G NR 6G Quantum PHY ML + PHY NTN ISAC O-RAN Beamforming MIMO
Core PHY
5G/6G Physical Layer Fundamentals
PRACH, PDCCH, beamforming, O-RAN timing, channel modeling, MIMO fundamentals and NR waveforms.
PHY · OFDM · NR · O-RAN
ML + PHY
Machine Learning for Wireless PHY
Neural receivers, deep channel estimation, AI-native air interface, reinforcement learning for beam management.
Deep Learning · Channel Est. · AI Radio
Quantum + PHY
Quantum Communications & PHY Layer
Quantum channel models, QKD, entanglement-assisted comms, and quantum-PHY interface in 6G architecture.
QKD · Entanglement · Quantum 6G
NTN + PHY
Non-Terrestrial Networks PHY Layer
Satellite PHY layer, NTN timing challenges, Doppler compensation, LEO/MEO/GEO channel models in 5G NR.
NTN · LEO · Satellite · 3GPP R17+
ML + Quantum
Quantum Machine Learning for Comms
QML for signal detection, variational quantum circuits in wireless, quantum-enhanced ML for PHY optimization.
QML · Variational Circuits · QNN
ISAC
Integrated Sensing & Communications
Joint radar-comms waveform design, OFDM-based ISAC, sensing-comms tradeoffs, 6G ISAC PHY design.
ISAC · OFDM · Radar · 6G
// notebooks & whitepapers view all →
OFDM · PHY · Fundamentals
OFDM Basics — DFT/FFT through 4G/5G/6G Waveforms
Interactive notebook · 11 sections · 21 charts
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ISAC · OFDM · Sensing
ISAC OFDM Notebook v2 — Integrated Sensing & Communications
Interactive notebook · PHY analysis · OFDM waveform
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Power Control · PRACH · 5G NR
5G NR PHY Initial Power Control — Complete Reference
Complete reference · MSG1/MSG3/PUCCH · 3GPP TS 38.213/38.321
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Channel Models · 3GPP TR 38.901
5G Channel Models — TR 38.901 Explained
Deep dive · CDL/TDL models · Spatial consistency · MIMO
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