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Transcript of Wireless Communication
-using certain kinds of waves that travel through the air What is it? Wireless communication Atlantic Canada -Wireless communication was performed for the first time ever in St. John's, NL at Signal Hill http://www.heritage.nf.ca/society/marconi.html Wireless communication Who invented it? http://www.pc.gc.ca/lhn-nhs/nl/signalhill/index.aspx Wireless communication was invented by an Italian man named Guglielmo Marconi Marconi's interest had always been the transmission of electromagnetic waves through the air Wireless communication Where did it come from? Communication had been done over cable wires at that point Heinrich Hertz had just discovered radio waves Marconi put these two ideas together to make wireless communication Wireless communication Encoding/Decoding You have to take what you want to say and turn it into a radio signal. At the time that meant translating a message into Morse code, and sending the beeps as a signal to be translated back into English somewhere else Analog/digital http://telecom.hellodirect.com/docs/Tutorials/AnalogVsDigital.1.051501.asp Analog signals are pulses Digital signals are 0s or 1s Wireless communication Analog When wireless communication was first invented, it would send out waves into the air. Waves are considered analog. Today we can use digital wireless
communication Wireless communication The future... Since the invention of wireless communication by Marconi, it has been used in many different ways: Ships, Radio, Walkie talkies. More recently is is responsible for cell phones and WIFI internet.
I think Wireless communication will continue to be an important part of our daily life in the future. By Mr. Grant http://en.wikipedia.org/wiki/Wireless