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Low-Power, Long-Range, Precise Localization
The document discusses low-power and long-range localization technologies, emphasizing low-power communication and its integration with sensors and actuators. It presents key concepts such as power budgets, range, accuracy, and different localization techniques including signal strength and time of flight. Additionally, it introduces the Dash7 RFID standard and an open-source stack for its implementation.
Low-Power, Long-Range, Precise Localization
- 1. Low-Power, Long-Range, Precise Localization Nextech 2014, Rome - 28 August 2014 Prof. Maarten Weyn maarten.weyn@uantwerpen.be
- 2. Research: Maarten Weyn I Localization: from Opportunistic to Just Enough I Low-power communication I Low-power
- 3. rmware development ISimultaneous Localization and Mapping Courses: I Mobile Communication I Digital Communication I Real-Time Localization Systems (Eng) I Ambient Intelligence (Eng): interaction between low-power communication, sensors, actuators, low-power hardware and algorithms 2
- 4. What I'm notgoing to do... I No sales talk I No academic formula's and equations I No futuristic foresights I No "You should's" 3
- 5. Low-Power, Long-Range, PreciseLocalization 4
- 6. Power Budget Range Accuracy/Precision Responsiveness Tag Size 5
- 7. Power Budget Range Accuracy/Precision Responsiveness Tag Size 6
- 8. Power Budget Range Accuracy/Precision Responsiveness Tag Size 7
- 9. Power Budget LowPower?: I LG Nexus 5: 2300 mAh / day ?!!! I Raspberry pi: 500 mAh I TelosB 8
- 10. Power Budget LowPower?: I LG Nexus 5: 2300 mAh / day ?!!! I Raspberry pi: 500 mAh I TelosB Application Driven: I e.g.: 1 year on coin cell (220 mAh) I e.g.: "the lifetime of the bird and weight 1 gram I e.g.: 2 year on 1/2 AA 3.6V battery (1100 mAh) ! 62Ah=day 8
- 11. Power Consumption: e.g.BLE I 3 x 12.8 mA x 660 s (0 dBm) I 0.00704 Ah / beacon 9
- 12. Power Consumption: e.g.BLE I 3 x 12.8 mA x 660 s (0 dBm) I 0.00704 Ah / beacon I iBeacon: 10 msg/s I ! 253.44 Ah ! 1 month with a coincell battery 9
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- 14. Accuracy vs Precision Source: Versus Technology, Inc. 11
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- 18. Techniques I SignalStrength: I Attenuation I Pattern Matching (Fingerprinting) I Presence / Proximity I Time (Ranging): I Time of Flight - Time Dierence of Arrival I Round Trip Time I Direction Finding / Angle of Arrival 15
- 19. Signal Strength RSSd= PrdBm = 10 log Pr (d0) 10np log d d0 + X 16
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- 25. Time of Flight:Time Dierence of Arrival TDOAB-A TDOAC-A A B C 22
- 26. Time of Flight:Round Trip Time 23
- 27. Time of Flight:Cramer Rao Bound 2 ^r c2 42B2Es N0 Source: Lanzisera et al.: Radio Frequency Time-of-Flight Distance Measurement 24
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- 30. Power Budget Range Accuracy/Precision Responsiveness Tag Size 27
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- 32. DASH7 Active RFIDStandard for 433 MHz. I Build on top of asynchronous WSN MAC. I High level functionality optimized for RFID. I De
- 33. nes full functionalRFID tag. I Can be extended to non RFID applications. Supports Tag to Tag communication. DASH7 Alliance Protocol is designed to support
- 34. xed and mobile nodes that need to upload or retrieve small chunks of information 29
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- 38. Open Source Stackfor DASH7 http://oss-7.cosys.be LGPL v2.1 33
- 39. Open Source Stackfor DASH7 34