Introduction
Wireless is a term used to describe telecommunications in which electromagnetic waves (rather than some form of wire) carry the signal over part or the entire communication path. The first wireless transmitters went on the air in the early 20th century using radiotelegraphy (Morse code). Later, as modulation made it possible to transmit voices and music via wireless, the medium came to be called "radio." With the advent of television, fax, data communication, and the effective use of a larger portion of the spectrum, the term "wireless" has been resurrected.
Common examples of wireless equipment in use today include:
• Cellular phones and pagers
• Global Positioning System (GPS)
• Cordless computer peripherals
• Cordless telephone sets
• Home-entertainment-system control boxes -- the VCR control and the TV channel control are the most common examples
• Remote garage-door openers
• Two-way radios
In this paper we will look at the following......
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