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VINDHYA INSTITUTE OF TECHNOLOGY AND SCIENCE

VINDHYA INSTITUTE OF TECHNOLOGY AND SCIENCE. W ireless c ommunication PRESENTED BY : NEHAL SAHU BE-EC-II(2 nd SEM ). C ONTENTS :-. INTRODUCTION HISTORY THE ELECTROMAGNETIC SPECTRUM WIFI COMPUTER INTERFACE DEVICE

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VINDHYA INSTITUTE OF TECHNOLOGY AND SCIENCE

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  1. VINDHYA INSTITUTE OF TECHNOLOGY AND SCIENCE Wirelesscommunication PRESENTED BY : NEHAL SAHU BE-EC-II(2ndSEM)

  2. CONTENTS:- • INTRODUCTION • HISTORY • THE ELECTROMAGNETIC SPECTRUM • WIFI • COMPUTER INTERFACE DEVICE • APPLICATION OF WIRE LESS COMPUTER

  3. INTRODUCTION • Wireless communication is the transfer of information over a distance without the use of electrical conductors or “wires”. • It encompasses various types of fixed, mobile and portable two way radios, cellular telephones, personal digital assistants(PDAs),& wireless networking.

  4. HISTORY • Photo phones – The world’s 1st wireless telephone conversation occurred in 1880 .When Alexander grahambell and Charles Sumner tainterinvented and patented the photo phone, a telephone that conducted audio conversation wirelessly over modulated light beams. • Radio –It is also used in 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 tech.(e.g. radio, infrared, ultrasonic)that is used to accomplish the operation.

  5. Electromagnetic spectrum • Light, colors, AM &FM radio & 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 communication commision. Wireless communication Spans the spectrum from 9KHz to 300GHz.

  6. WI F I • WIFI is a wireless LAN technology that enables laptop PC’s ,PDA’s and other devices to connect easily to the internet. • Several wi-fi hot spots have been popular over the past few years. • Some business charge customers a monthly fee for service, while others have begun offering it for free in an effort to increase the sales of their goods.

  7. Computer interfacedevices Answering the call of customers frustrated with cord clutter, many manufactures of computer peripherals turned to wireless technology to satisfy their consumer base. These systems have become so ubiquitous that some users have begun complaining about a lack of wired peripherals. Wireless devices tend to have a slightly slower response time than their wired counterparts, however the gap is decreasing.

  8. Application of wirelesscommunication • Security system:-wireless technology may supplement or replace hard wired implementations in security systems for homes or office building. • Television remotecontrol:-modern television use wireless(generaly infrared)remote control units. now radio waves are also used.

  9. Cellular telephony(phonesandmodems):- perhaps the best known example of wireless technology is the cellular telephone & modems.

  10. These instruments use radio waves to enable the operators to make phone calls from many locations worldwide. they can be used anywhere that there is a cellular telephone bite to house the equipment that is required to transmit & receive the signal that is used to transfer both voice & data to and from these instruments.

  11. Any Questions…..???

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