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Wi-Fi · PHYJun 2026
Why SIFS Is 10µs in 2.4 GHz and 16µs in 5 GHz
SIFS looks like it changes with the band, but it depends on the PHY type. The story of DSSS, OFDM and 802.11g Signal Extension.
Read post Wi-Fi · PHYJun 2026The Math Behind Wi-Fi Airtime Calculation
Where does 192 microseconds of airtime come from? A step-by-step trace from payload to OFDM symbols, from first principles.
Read post Wi-Fi · SimulationJun 2026Simulate a Full Wi-Fi Network in Software with mac80211_hwsim
Run a complete 802.11 network. AP, client, association, monitor mode and live capture in Wireshark with zero Wi-Fi radios.
Read post Wi-Fi · CaptureJun 2026Wi-Fi Frame Capture on Samsung (S24/S25) in Monitor Mode
Capture 802.11 frames in monitor mode on Samsung Galaxy devices with no root and no special permissions. A step-by-step guide.
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