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WIRELESS COMMUNICATIO N BY INDU SAGAR 10R91A04A2 TEJASWINI 10R91A0449

Wireless Communication Ppt

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Page 1: Wireless Communication Ppt

WIRELESS COMMUNICATION

BY

INDU SAGAR10R91A04A2TEJASWINI

10R91A0449

Page 2: Wireless Communication Ppt

contentsINTRODUCTIONHistory Wireless communicationApplications Categories of wireless implementations,

devices and standardsConclusion

Page 3: Wireless Communication Ppt

Introduction:In 1895,Guglielmo Marconi opened the way

for modern wireless communications by transmitting the three-dot Morse code for the letter ‘S’ over a distance of three kilometers using electromagnetic waves.

From this beginning, wireless communications has developed into a key element of modern society.

From satellite transmission, radio and television broadcasting to the now ubiquitous mobile telephone, wireless communications has revolutionized the way societies function.

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History: The term "Wireless" came into public use to refer to a radio receiver or

transceiver, establishing its usage in the field of wireless telegraphy early on…

Now the term is used to describe modern wireless connections such as in cellular networks and wireless broadband Internet.

It is also used in a general sense to refer to any type of operation that is implemented without the use of wires, such as "wireless remote control" or "wireless energy transfer", regardless of the specific technology that is used to accomplish the operation.

  EARLY WIRELESSWORK: 1914 - First voice over radio transmission. 1920s - Mobile receivers installed in police cars in Detroit. 1930s - Mobile transmitters developed; radio equipment occupied most of police car trunk. 1935 - Frequency modulation (FM) demonstrated by Armstrong 1940s - Majority of police systems converted to FM.

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WIRELESS COMMUNICATION:Wireless communication is the transfer of information over a

distance without the use of electrical conductors or "wires“.The distances involved may be short (a few meters as in

television remote control) or long (thousands or millions of kilometers for radio

communications).When the context is clear, the term is often shortened to

"wireless". Wireless communication is generally considered to be a

branch of telecommunications.  

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ELECTROMAGNETIC SPECTRUM:Light, colors, AM and FM radio and

electronic devices make use of the electromagnetic spectrum.

In the US the frequencies that are available for use for communication are treated as a public resource and are regulated by the Federal Communications Commission.

This determines which frequency ranges can be used for what purpose and by whom.

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APPLICATIONS OF WIRELESS TECHNOLOGY:1. SECURITY SYSTEMS:Anti-theft ReportingEmergency ReportingArm/Disarm by SMSMonitoring/ TalkingPower Failure Reporting

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2. TELEVISION REMOTE CONTROL:A remote control is an electronic device used

for the remote operation of a machine.Commonly, remote controls are consumer IR

devices used to issue commands from a distanceto TV or DVD

Most of these remotes communicate to their respective devices via infrared signals and few radio signals.

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3. CELLULAR TELEPHONY: (PHONES AND MODES)

The best known example of wireless technology is the cellular telephone and modems.

These instruments use radio waves to enable the operator to make phone calls from many locations world-wide.

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4.WI-FI:Wi-Fi technology delivers highly

sophisticated phones to 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 great functionality like 3G Calling, Call Waiting, Call Transfer and many other useful features.

Fi phones are available with the brands such as Nokia, Sony Ericsson, Motorola, Samsung and LG mobile phone

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5. WIRELESS ENERGY TRANSFER:Wireless energy transfer is a process

whereby electrical energy is transmitted from a power source to an electrical load that does not have a built-in power source, without the use of interconnecting wires .

 

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6. COMPUTER INTERFACE DEVICES:Usb, pen drives and bluetooth devicesOriginally units used bulky,highly limited

transceivers to mediate between a computer and a keyboard and mouse,

Recent generation have used small,high quality devices some even incorporating “BLUETOOTH”.

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7. CATEGORIES OF WIRELESS IMPLEMENTATION,DEVICES AND STANDARDS:

Radio communiction systemBroadcastingAmateur radioLand Mobile Radio Communication RadioCordless Telephony:DECT(Digital Enhanced Cordless

Telecommunication)Cellular Systems:0G,1G,2G,3G,Beyond 3G(4G),Future

wireless

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CONCLUSION:•By using wireless communication we can easily transfer the data because it is portable•Reliable•Lightweight And • cheap in cost