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Playlist "Gulaschprogrammiernacht 22"

How a Wifi chip works internally


This talk will provide an overview of all the pieces it takes to receive data via Wifi. Starting with the basics of encoding information in wireless signals we will go over various building blocks (hardware and software) needed to receive bits and bytes via Wifi.

Deep Dive into the 802.11 Wifi standard. The talk starts with an overview of which hardware is involved into receiving Wifi signals and how signals get converted into bits. During the talk we will explain the hurdles which need to be taken to receive Wifi and which solutions the Wifi standard describes to solve them. We will also look into several real world Wifi implementations based on SDR transceivers or proprietary datasheets from Broadcom. In the end we will briefly discuss what would be necessary to create open source firmware for full-MAC Wifi chips.