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Victim Localization Using RF-signals and Multiple Agents in Search & Rescue
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, Faculty of Science & Engineering.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A common problem in existing Search And Rescue (SAR) systems is that they must be activated by the missing person in order to work. This requires an awareness of the the risk of becoming distressed, which in many cases is not feasible. Furthermore, most of the localization systems require specialized hardware.In this thesis, the victim is assumed to wear a cellphone that could be located using readily available consumer electronics. A method of estimating the position of a transmitter, given radio signal measurements at different locations, is developed and verified with real and simulated data. A proof-of-concept system is built in which several users can jointly collect received signal strength data at different locations using mobile phones. The system analyzes the data in real-time and guides the users in the search by estimating the origin of the signal.An outdoor field test is conducted in which the searchers using the system are able to locate the hidden target phone without prior knowledge regarding the position. We are able to localize the victim with an accuracy of 10-20 meters in a timely manner using android smartphones. This shows the potential of a similar system in \abbrSAR scenarios. However, more work is needed to make the system viable in real scenarios and to remove some of the delimitations of the current implementation.

Place, publisher, year, edition, pages
2015. , 52 p.
Keyword [en]
localization, agents, search & rescue, RF, Wi-Fi, android, mobile, drone, unmanned aerial vehicle, RSS
National Category
Control Engineering
URN: urn:nbn:se:liu:diva-120620ISRN: LiTH-ISY-EX-15/4871-SEOAI: diva2:847134
External cooperation
Combitech AB
Subject / course
Computer Engineering
2015-06-04, Systemet, Linköpings university building B, Linköping, 13:15 (English)
Available from: 2015-08-19 Created: 2015-08-19 Last updated: 2015-08-19Bibliographically approved

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