Anandtech has published an excellent article concerning how Wifi (at the L1/L2 level) works:
http://www.anandtech.com/show/10081/wifi-testing-with-ixia-wavedevice
(the Pixel and iPad performance reviews in that article are just a bonus - the meat lies in the detailed Wifi technology explanations.)
http://www.anandtech.com/show/10081/wifi-testing-with-ixia-wavedevice
(the Pixel and iPad performance reviews in that article are just a bonus - the meat lies in the detailed Wifi technology explanations.)