Your SlideShare is downloading. ×
0
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Eladio Martin - Presentation at Emerging Communications Conference & Awards (eComm 2011)

753

Published on

Please see blog http://blog.eComm.ec

Please see blog http://blog.eComm.ec

Published in: Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
753
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
12
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1.
  • 2. eComm 2011, San Francisco Alternatives to GPS for Localization Leveraging Smart Phones. June 29th 2011<br />Slide 2 of 16<br />
  • 3. Location Applications<br />Monitoring<br />Tracking<br />Assisted Living<br />Targeted advertising<br />Social Networking<br /><ul><li>10% of all the iPhone applications employ location information
  • 4. A quarter of all USA wireless phone users have utilized LBS</li></ul>Slide 3 of 16<br />
  • 5. Satellite Navigation Systems<br />USA: GPS<br />European Union: Galileo (2014)<br />€ 5.3 billion<br />Russia: GLONNAS (2011)<br />Most expensive project in Russian Federal Space Agency<br />China: Compass (2020)<br /><ul><li>Other regional satellite-based systems:
  • 6. France: Doris
  • 7. India: IRNSS (2014)
  • 8. Japan: QZSS (2013)</li></ul>Slide 4 of 16<br />
  • 9. GPS Accuracy ~ 6 meters<br />GPS errors’ sources:<br />Ionospheric effects (±5meters), <br />Shifts in the satellite orbits (±2.5 meters), <br />Satellite clock errors (±2 meters), <br />Multipath effects (±1 meters), <br />Tropospheric effects (±0.5 meters), <br />Calculation and rounding errors (±1 meters)<br />Slide 5 of 16<br />
  • 10. Main Drawbacks of Satellite Systems<br /><ul><li>Power
  • 11. Coverage</li></ul>Slide 6 of 16<br />
  • 12. Satellite Navigation Systems<br />USA: GPS<br />European Union: Galileo (2014)<br />€ 5.3 billion<br />Russia: GLONNAS (2011)<br />Most expensive project in Russian Federal Space Agency<br />China: Compass (2020)<br /><ul><li>Other regional satellite-based systems:
  • 13. France: Doris
  • 14. India: IRNSS (2014)
  • 15. Japan: QZSS (2013)</li></ul>Slide 7 of 16<br />
  • 16. Alternatives to GPS<br /><ul><li> High Sensitivity GPS</li></ul>Advanced signal processing techniques.<br /><ul><li>Low accuracy
  • 17. Inertial Navigation Units (acc + gyro)
  • 18. Very expensive.
  • 19. Radio Fingerprinting</li></ul>Slide 8 of 16<br />
  • 20. WiFi Fingerprinting in the iPhone<br />Slide 9 of 40<br />
  • 21. Outdoor WiFi Fingerprinting in Smart Phones<br /><ul><li>Accuracy depends on density of Access Points</li></ul>Typical error: 50 meters.<br /><ul><li> Example: WiFi-based Localization by Google</li></ul>Slide 10 of 16<br />
  • 22. Radio Fingerprinting<br />Slide 11 of 40<br />
  • 23. Cellular Fingerprinting<br /><ul><li>Existing systems need Dedicated Hardware
  • 24. Smart Phones:
  • 25. Granularity is poor and Hardware dependent
  • 26. Slow refreshing rate
  • 27. Only RSSI information from the same SIM card operator </li></ul>Slide 12 of 16<br />
  • 28. Fingerprinting with other Technologies<br /><ul><li>Bluetooth
  • 29. Accuracy of up to 1.2 meters
  • 30. Dedicated Hardware
  • 31. Conventional Radio
  • 32. Dedicated Hardware
  • 33. Low accuracy (urban suburb)
  • 34. Digital TV
  • 35. Dedicated Hardware
  • 36. Zigbee
  • 37. Dedicated Hardware</li></ul>Slide 13 of 16<br />
  • 38. State-of-Art in WiFi Fingerprinting<br /><ul><li>Radar, by Microsoft
  • 39. Accuracy 2 – 3 meters
  • 40. Dedicated Hardware
  • 41. Ekahau
  • 42. Accuracy 1 – 3 meters
  • 43. Dedicated Hardware</li></ul>Slide 14 of 16<br />
  • 44. Improvements that Smart Phones can bring to Fingerprinting<br /><ul><li> Integrate both the online and offline phases in fingerprinting
  • 45. Avoid errors due to differences in antenna characteristics and measurement schemes between different equipments
  • 46. e.g. 10 dB between Dell Latitude laptop and Motorola Droid phone
  • 47. Leverage accelerometer (gravity vector) and magnetometer (orientation)
  • 48. Orientation of phone helps enhance the localization accuracy</li></ul>Slide 15 of 16<br />
  • 49. WiFi Fingerprinting with Smart Phones<br />Slide 16 of 40<br />
  • 50. Stride Length Estimation with Wavelet<br />Slide 17 of 40<br />

×