1)Four physical channels
a)the basic piconet channel : used for communication between connected devices
b)the adapted piconet channel : used for associated with a specific piconet.
c)the inquiry scan channel : used for discovering bluetooth device
d)the page scan channel : used for connecting bluetooth device
2)The frequency hopping in the piconet physical channel is determined by
a)Bluetooth clock
b)BD_ADDR of the master.
3)For Bluetooth ,two modulation modes are defined.
a)A mandatory mode,called Basic Rate (FM modulation) 1Mbps
b)An optional mode,called Enhanced Data Rate. (PSK modulation) pi/4-DQPSK : 2Mbps 8DPSK:3Mbps
4)Bluetooth Frequency Bands
2.400 ~ 2.4835GHZ f = 2402 + k MHZ, k=0,,78
lower guard band 2MHZ
upper guard band 3.5MHZ
5)The Bluetooth device is classified into three power classes
a)Class 1 : 1mW(0dBm) ~ 100mW(20dBm)
b)Class 2 : 0.25mW(-6dBm) ~ 2.5mW(4dBm)
c)Class 3 : N/A ~ 1mW(0dBm)