Commercial Wireless Technologies and
Examples.
Here is a list of commercial wireless technologies available
today.
AM radio
broadcasting. For example, Akashavani.
FM radio
Frequency modulated radio, provides better quality of sound for
short range broadcasting. For example, Radio City.
Short wave radio
Used for communications, handheld radios and walkie talkies.
For example, radio handsets used by law enforcement agencies.
TV broadcasting
Digitally modulated signals carrying live audio and video for
television audience. For example, Tata Sky.
Satellite communications
Satellites in geostationary orbits are used to capture and
rebroadcast signals for intercontinental communications. For
example, the INSAT series.
GSM
Global system for mobile communications is a cellular
telephony technology based on time division and frequency
division multiplexing. Operates at 900, 1,800 and 2,700 MHz.
For example, Airtel, Idea, etc
CDMA
This is a cellular telephony technology based on code division multiplexing. For example, Tata Indicom and Reliance Communications.
Infrared
Cordless telephones
Use radio waves to avoid the wire connecting the handset and
the base unit.
GPS
Satellite-based positioning service that uses radio waves.
Wireless peripherals
Use radio waves instead of wires to connect to the PC. For
example, wireless keyboard and mice.
Bluetooth
5-GHz short range wireless technology that allows several types
of equipped electronic devices to interconnect.
Wi-Fi
Also known as IEEE 802.11a, b, g and n, this allows wireless
local area networks to be set up. It also allows local wireless
internet connections called hotspots.
RFID
Radio frequency identification devices, in which objects/
humans/animals wear small radio tagged devices that allow
them to be located. For example, radio collars for dogs.
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By Amrut Deshmukh
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