802 11 PHY


Band Freq. Range Bandwidth Max Power Max EIRP
ISM-900 902-928 MHz 26 MHz 1 Watt 4 Watt (+36 dBm)
ISM-2400 2400-2483.5 MHz 83.5 MHz 1 Watt 4 Watt (+36 dBm) for PtMP, 200 mW for PtP)
ISM-5800 5725-5850 MHz 125 MHz 1 Watt 200 mW (+53 dBm)
  • ITU-R ISM band
  • The rate adaptation function is performed at the sender.
  • The success and failure history
  • For every 2nd ACK miss( transmission failure) following good transmission, fallback to lower rate and set a timer. Whenever the consecutive 10 good transmission or timer expired, upgrade to higher rate. Then, if miss ACK, fallback to lower rate.
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