Bluetooth Technology Seminar report
Bluetooth is a wireless protocol for exchanging data over short distances from fixed and mobile devices, creating personal area networks (PANs). It was originally conceived as a wireless alternative to RS232 data cables. It can connect several devices, overcoming problems of synchronization.
Working of Bluetooth
Bluetooth uses a radio-technology frequency-hopping spread
spectrum,, which chops up the data being sent and transmits chunks of it on
up to 79 frequencies. In its basic mode, the modulation is Gaussian
frequency-shift keying (GFSK). It can achieve a gross data rate of 1Mbps.
Bluetooth provides a way to connect and exchange information between
devices such as mobile phones, telephones, laptops, personal
computers, printers, Global Positioning System (GPS) receivers, digital
cameras, and video game consoles.
Bluetooth takes small-area networking to the next level by removing the
need for user intervention and keeping transmission power extremely low
to save battery power.
Picture this: You're on your Bluetooth-enabled cell phone, standing outside the door to your house. You tell the person on the other end of the line to call you back in five minutes so you can get in the house and put your stuff away. As soon as you walk in the house, the map you received on your cell phone from your car's Bluetooth-enabled GPSsystem is automatically sent to your Bluetooth-enabled computer, because your cell phone picked up a Bluetooth signal from your PC and automatically sent the data you designated for transfer. Five minutes later, when your friend calls you back, your Bluetooth-enabled home phone rings instead of your cell phone. The person called the same number, but your home phone picked up the Bluetooth signal from your cell phone and automatically re-routed the call because it realized you were home. And each transmission signal to and from your cell phone consumes just 1 milliwatt of power, so your cell phone charge is virtually unaffected by all of this activity.
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