Wireless optical communication system

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  • 1. GUIDE- MADE BY-MS. PINKI NAYAK VIBHUMS. BINDU E. 00910497610
  • 2. INTRODUCTION Replace radio waves with beams of light .Works in the infrared or near infrared regionof light .Consists of transreceiver.
  • 3.  Optical Intensity Modulation Direct Detection
  • 4. Channel Topologies Point-to-Point LinkDiffuse linkQuasi Diffuse Link
  • 5.  Direct‚ unobstructed path between a transmitter and a receiver. Sensitive to Blocking and shadowing.
  • 6.  Radiate optical power over a wide solid angle. Provide mobility to the receiver. High path loss.
  • 7.  Inheritaspects of both point-to-point and diffuse links. Slowly diverging beam sources which illuminate a grid of spots on the ceiling.
  • 8. Advantages Disadvantages Low cost, base-band  Cannot pass through walls circuit design  Sensitive to blocking High date rates (Gbps)  Limited Transmit Power less multi access interference No need to pay for spectrum license
  • 9. LIGHT WAVE RADIO WAVEBANDWIDTH VIRTUALLY UNLIMITED LIMITED BANDWIDTHPASSES THROUGH NO YESWALLCOST LOW HIGHSPEED HIGH LOW
  • 10.  Short range (cm – m) Chip-to-Chip Interface Medium range (m – 10 m) Wireless Optical LAN Long range (km) Free-Space Optical Communications
  • 11.  It can be used to illuminate the room while serving as a medium for data transfer.
  • 12.  Itcan be used to transfer data at high speed for long distance
  • 13.  It can be used for high speed long distance data transfer using satellite.
  • 14.  Without any licensing hurdle provide high speed and high bandwidth communication.
  • 15. REFERENCES R. Gfeller and U. Bapst. Wireless in-house communication via diffuseinfrared radiation. Proceedings of the IEEE, 67(11): 1474–1486,November 1979.J. R. Barry. Wireless Infrared Communications. Kluge Academic Publishers, Boston, MA, 1994 .R. Otte , L. P. de Jong and A. H. M. van Roermund. Low-Power WirelessInfrared Communications. Kluwer Academic Publishers, Boston, MA,1999.S. Hranilovic. Spectrally Efficient Signalling for Wireless OpticalIntensity Channels. PhD thesis, Dept. of Elec. & Comp. Engineering,University of Toronto, 2003. [1]
  • 16. THANK YOU