TELECOMMUNICATIONS SYSTEMS
COMMUNICATION WIRELESS COMPUTING DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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91
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96
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79
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53
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Detailed explanation-1: -The Bluetooth Classic radio, also referred to as Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR), is a low power radio that streams data over 79 channels in the 2.4GHz unlicensed industrial, scientific, and medical (ISM) frequency band.
Detailed explanation-2: -Bluetooth Radio Behavior in the 2.4 GHz ISM Band Bluetooth BR and EDR radios use a 79 channel, pseudo-random frequency hopping radio with 1 MHz channel spacing. The hopping rate is 1, 600 hops a second, giving a hop interval of 625 µs but the basic packet length is 366 µs.
Detailed explanation-3: -It uses frequency hopping between 2.402 GHz and 2.480 GHz to make it a more secure way of transmitting information. In fact, this frequency band is specifically reserved for industrial, scientific and medical (ISM) devices as a result of an international agreement!
Detailed explanation-4: -Bluetooth divides the frequency band into smaller channels (e.g. 40 channels in the case of Bluetooth Low Energy) and rapidly hops between those channels when transmitting packets. To further reduce the chance of interference, Bluetooth adapts its hopping sequence.