Specification of the IEEE 802.11bf amendment for Wi-Fi sensing, covering trigger-based sounding, subcarrier-level CSI reporting, and the calibration pipeline required to extract usable range-Doppler information from commodity access points.
Details the Null Data Packet Announcement (NDPA) sounding exchange, trigger-based multi-user sounding, and the standardized CSI feedback format that exposes per-subcarrier amplitude and phase to sensing applications.
Covers subcarrier pruning strategies, per-antenna SNR weighting, and bandwidth-dependent resolution trade-offs (20/40/80/160 MHz) for extracting usable CSI from consumer-grade Wi-Fi 7/8 chipsets.