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wireless communication systems

information about wireless communication systems

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wireless communication systems

  1. 1. WIRELESS COMMUNICATION SYSTEM BY G.VISHNUVARTHINI
  2. 2. CONTENT  INTRODUCTION  TYPES  TYPES EXPLANATIONS  TYPICAL FREQUENCIES  ADVANTAGES  DISADVANTAGES  APPLICATIONS  FUTURE TECHNOLOGIES  COCLUSION
  3. 3. INTRODUCTION  Wireless communication is a method of transmitting information from one point to other , without using any connection like wires, cables or any physical medium.  Generally in a communication system, information is transmitted from transmitter to receiver that are placed over a limited distance.
  4. 4. WHY WIRELESS COMMUNICATION? 1 Freedom from wires and global coverage 2 No bunch of wires running from here and there 3 “auto magical” instantaneo us communica tion e.g. Wi-Fi 4 Communi cation can reach where wiring is infeasible 5 E.g.- rural areas , buildings ,battlefield & outerspace 6 Flexibility to connect multiple devices
  5. 5. TYPES OF WIRELESS COMMUNICATION SYSTEMS 1 Television and radio broadcasting 2 satellite communication 3 mobile telephone communication system 4 Global positioning system(GPS) 5Bluetooth 6paging 7Wireless local area network(WLAN) 8 Infrared communication TYPES OF WIRELESS
  6. 6. PAGING SYSTEM Broad coverage for short messages and overtaken by cellular Message broadcast from all base stations Optimized for one way transmission
  7. 7. INFRARED WIRELESS COMMUNICATION  IR wireless is the use of wireless technology in devices or systems that convey data through infrared radiation.  Infrared is electromagnetic energy at a wavelength or wavelengths some what longer than those of red light.
  8. 8. Levels & Hierarchy
  9. 9. TYPICAL FREQUENCIES 2 TV BROADC AST-200 MHZ 1 FM RADIO-88 MHZ 3 GPS-1.2 GHZ 4 BLUETOOT H-2.4 GHZ 5 WI-FI-2.4 GHZ
  10. 10. ADVANTAGES Flexibility1 Ease of use2 Durability3
  11. 11. DISADVANTAGES 1 Compatibility issue 2 Ethernet 3 Significantly Slower than a wired network
  12. 12. APPLICATIONS Computer interface devices Wi-fi Wireless power transfer cell phones Television remote control Security systems
  13. 13. WIRELESS TECHNOLOGIES FOR FUTURE MOBILE DEVICES AND GADGETS  Wi-fi(2.4 GHZ and 5GHZ)  wiGig is an advanced version of wi-fi( operates 60 GHZ)  Li-Fi(speed can’t be detected by human eyes, specific light sensors can detect these signals)  NFC(near field communication technology)  5G NR Millimeter waves
  14. 14. CONCLUSION  The swift development of wireless has enabled so many parallel technologies, increased productivity and even saved countless lives.  The future for wireless looks set to include even more applications which can give humans an edge.  Another positive of this growth is that wireless technology has gotten really cheap which means that more people have access to it.  Wireless innovations have made the world a much smaller place .
  15. 15. Thank you

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