DJI/Caddx are using basically LTE radios, I doubt WiFi chipsets will have acceptable perf. Still, for fixed wing this might be acceptable and cheaper than existing systems. For freestyle/racing.. forget it.
Typically speaking, even if you are getting around 10-12Mbps over wifi that means each 720p raw frame takes only ~2-3ms to transmit. Most of the time is spent in encoding and decoding the video frames, waiting for retransmissions etc..
Also they aren't exactly using Wifi. They're using just the chipset to broadcast. Here's the interesting talk from the original author of wifibroadcast . The challenges they fixed to use wifi hardware for transmission: https://media.ccc.de/v/36c3-10630-wifibroadcast .
Also they aren't exactly using Wifi. They're using just the chipset to broadcast. Here's the interesting talk from the original author of wifibroadcast . The challenges they fixed to use wifi hardware for transmission: https://media.ccc.de/v/36c3-10630-wifibroadcast .