GPS Presentation

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GPS Presentation

  1. 1. GPS<br />By: Scott Laspe<br />
  2. 2. Background Info<br />First usages of Global Positioning Systems<br />Military<br />Navy 1967 (one update per hour)<br />Air force 1972<br /> Civilian not until 1996<br />Clinton allowed civilian signals<br />
  3. 3. How GPS Works<br />24 satellites orbiting earth (11,000 miles)<br />Determine locations through Triangulation<br />Broadcast radio waves between each other<br />Pinpoint Receiver location<br />Time and Distance<br />
  4. 4. Increase Popularity, Increasing Problems<br />Garmin – TomTom – Magellan<br />Affordable<br />Flaws<br />Availability<br />Strength and Accuracy<br />Security<br />
  5. 5. My Solutions<br />Availability (denial of service)<br />Apply wireless networking principles<br />Cell phone base station handoffs<br />Security (signal encryption)<br />Quantum Cryptography<br />Strength and Accuracy (response time)<br />Repeater<br />
  6. 6. Availability<br />Communication between satellites and antenna (receiver entering cell)<br />Data packets received by antenna<br />Antenna connected to wireless routers<br />Efficiency/timely manner<br />Leaving tunnel (cell) receiver establishes direct communication with satellite<br />
  7. 7. Experiment/Success<br />Real life test / Trial and Error<br />Driving through a tunnel with a unit<br />Clean handoff into new network<br />Use newest IEEE 802.11n wireless networking standard<br />Fastest data transfer and most bandwidth available<br />
  8. 8. Security<br />Key encryption – (eventually can be cracked)<br />Quantum Cryptography – fiber optics<br />Apply it to data transmission from satellite to receiver<br />Military use sensitive information<br />
  9. 9. Experiment/Success<br />Implement a controlled session with an outsider trying to tap into connection (disrupt signal)<br />IF successful one of several data communication channels should shut<br />Preventing intruder to eavesdrop<br />Heisenberg Uncertainty principle measures continuousness of a signal<br />Measures momentum of signal and continuousness of signal. <br />Values are based around Planck’s constant that determines if there is enough disruption in the signal<br />
  10. 10. Strength and Accuracy<br />Initialization period (warm boot/cold boot)<br />Long time is a form of DoS<br />Repeater device that can boost signal<br />Maintain strength over long distance<br />Improves accuracy of the units true location<br />
  11. 11. Experiment/Success<br />Before and After results would determine how successful my repeater theory is<br />S/N ratio before the repeater and then after<br />S/N<br />Power of signal/Power of noise<br />Percent change of before and after could tell me exactly how successful the experiment is<br />New cold boot time vs old cold boot time<br />
  12. 12. Closing<br />GPS constantly evolving as technology advances<br />Stronger military capabilities and more efficient emergency response programs<br />Understand the world better<br />Terrain<br />Natural Resources<br />

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