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CONTENTS Introduction

Wireless communication History * Early w ireless work Applications of wireless technology * Television remote control * Cellular telephony (phones and m odems) * WiFi * W ireless energy transfers Categories of wireless implementations, devices andstandards


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IntroductionIn 1895, Guglielmo Marconi opened the wayfor modern wireless communications bytransmitting the three-dot Morse code for the

letter S over a distance of three kilometersusing electromagnetic waves.From this beginning, wirelesscommunications has developed into a keyelement of modern society.


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WIRELESS COMMUNICATIONSWireless communication is the transfer ofinformation over a distance without the use ofelectrical conductorsor "wires.The distances involved may be short (a fewmeters as in television remote control) orlong (thousands or millions of kilometers for

radio communications).When the context is clear, the term is oftenshortened to "wireless".


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Pen drive Cell phone


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History

The term "Wireless" came into public use to referto a radio receiver or transceiver, establishing itsusage in the field of wireless telegraphy earlyon Now the term is used to describe modernwireless connections such as in cellularnetworks and wireless broadband Internet.It is also used in a general sense to refer to anytype of operation that is implemented withoutthe use of wires,such as "wireless remote control" or "wirelessenergy transfer",


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Early wirelesswork 1914 - First voice over radio transmission 1920s - Mobile receivers installed in police cars inDetroit 1930s - Mobile transmitters developed; radioequipmentoccupied most of police car trunk 1935 - Frequency modulation (FM) demonstrated byArmstrong 1940s - Majority of police systems converted to FM


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TELEVISION REMOTECONTROLA remote control is an electronic device used for theremote operation of amachine.Commonly, remote controls areconsumer IR devices used toissue commands from a distanceto TV or DVDMost of these remotes communicate to their respectivedevices via infrared signals and few radio signals.


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3.CELLULAR TELEPHONY(PHONES AND MODES)The best known example of wirelesstechnology is the cellular telephone andmodems.These instruments use radio waves to enablethe operator to make phone calls from manylocations world-wide.


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Modems


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4.WI-FIWi-Fi technology delivers highly sophisticated phonesto takes you towards new roads of excellence.Wi Fi phones provides you with a new and cost-effective way to talk over the Internet, with greatfunctionality like 3G Calling, Call Waiting, CallTransfer and many other useful features.The best Wi Fi phones are available with the brandssuch as Nokia, Sony Ericsson, Motorola, Samsungand LG mobile phone.


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6. COMPUTER INTERFACEDEVICESUsb, pen drives and bluetooth devicesOriginally units used bulky,highly limitedtransceivers to mediate between a computerand a keyboard and mouse,Recent generation have used small,highquality devices some even incorporatingBLUETOOTH


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6.CATEGORIES OF WIRELESSIMPLEMENTATION,DEVICES ANDSTANDARDSRadio communication system

Land Mobile RadioCommunication RadioCellular Systems:0G,1G,2G,3G,Beyond3G(4G),Future wireless


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CONCLUSIONBy using wireless communication we caneasily transfer the data because it is portableReliableLightweightAnd cheap in cost


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QUERIES..?


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