Wireless communication transfers information between points without a physical connection. Guglielmo Marconi invented the wireless telegraph in 1896, transmitting signals across the Atlantic. Voice communication over radio followed in 1914. Communications satellites launched in the 1960s advanced wireless technology for radio, TV, and mobile phones. More recently, wireless includes satellite communication, wireless networks, and cellular technology. Wireless systems operate at different ranges from centimeters to thousands of kilometers.

2. Wireless communication is the transfer of information between two or
more points that are not connected by an electrical conductor.

3. HISTORY OF WIRELESS COMMUNICATION

Guglielmo Marconi invented the wireless telegraph
in 1896


Communication by encoding alphanumeric characters in
analog signal
Sent telegraphic signals across the Atlantic Ocean
1914 – first voice communication over radio waves
 Communications satellites launched in 1960s
 Advances in wireless technology



Radio, television, mobile telephone, communication
satellites
More recently

Satellite communications, wireless networking, cellular
technology

4. TYPES OF WIRELESS COMMUNICATION

5. WIRELESS SYSTEMS: RANGE COMPARISON
1 m 10 m
100 m
Bluetooth
1 Km
WLANs
10 Km
Mobile
Telephony
100 Km
1,000 Km
MW SW
Satellite
FM
Radio Radio Radio Links

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