OVERVIEW: Bluetooth® Wireless System
1.11 Bluetooth® Wireless System
Bluetooth technology is used for short range wireless communications that do not require
high data rates. The original usage models included telephone, headsets, low-data rate
access point, file transfer, and automatic synchronization. The newer usage models have
added human interface devices, remote control, print capability, cable replacements and
personal area networks.
Bluetooth devices use GFSK modulation in the 2.4 to 2.4835 GHz band. The channels have
a bandwidth of 1 MHz. Frequency hopping is used to provide immunity to interference.
The master unit in a pico-net dictates the hopping sequence at a rate of 1600 hops per
second. This translates to a 625 uS transmission. The maximum data rate through a
Bluetooth device is 3 Mb per second.
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