IEEE 802.11af, also referred to as White-Fi and Super Wi-Fi,[1][2] is a wireless computer networking standard in the 802.11 family, that allows wireless local area network (WLAN) operation in TV white space spectrum in the VHF and UHF bands between 54 and 790 MHz.
[3] The physical (PHY) layer in 802.11af is based on the orthogonal frequency-division multiplexing (OFDM) scheme specified in 802.11ac.
[3] In the United States, the Federal Communications Commission (FCC) permits TV white space operation in 6 MHz channels between 54 and 698 MHz in TV channels 2, 5, 6, 14–35, and 38–51, with the geolocation database granting use for up to 48 hours.
[3] The allowed transmit power is dynamically set on a per-station basis, based on factors including the geographical distance to the next primary user in the given frequency.
[3] This closed-loop scheme requires each station to report its position after a timer has expired or it has moved 50 m or more, and to stop transmitting within 5 s when instructed to do so.