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Network Computing Laboratory
Radio Interferometric GeolocationRadio Interferometric Geolocation
Miklos Maroti, Peter Volgesi, Sebestyen Dora Branislav Kusy, Gyorgy Balogh, Andras NadasKaroly Molnar, Akos Ledeczi (Vanderbilt Univ.)
2006. 11. 07. Tue.Presentor : Kim, Chanho
Korea Advanced Institute of Science and Technology
Network Computing Laboratory | 2
ContentsContents
One Line SummaryIntroductionRIPS (Radio Interferometric Positioning System)
Source of ErrorImplementation IssuesRange CalculationLocalization
ExperimentConclusion
Korea Advanced Institute of Science and Technology
Network Computing Laboratory | 3
One Line SummaryOne Line Summary
Introduce novel ranging technique (RIPS) for wireless sensor networks using application of the interference signal
Korea Advanced Institute of Science and Technology
Network Computing Laboratory | 4
IntroductionIntroduction
Many application of the WSN require individual nodes’ locationState of Art
Ultrasound method, Ultrasonic method, …Limitation : cannot have adequate accuracy , acceptable range at the same time / work in 2D only
Radio Interferometry High accuracy, long rangeWork in 3D environment
Korea Advanced Institute of Science and Technology
Network Computing Laboratory | 5
IntroductionIntroduction
TermsRanging: determine distances between nodesLocalization: find physical 3-D locations of nodesInterference: superposition of two or more waves resulting in a new wave patternInterferometry: cross-correlates a signal from a single source recorded by 2 observers, used in geodesy, astronomy, …
Korea Advanced Institute of Science and Technology
1. Selecting a pair of transmitters & scheduling2. Calibration of the radios of senders3. Transmission of a pure sine wave4. Analysis of the RSSI samples of the interference signal at
each of the receivers5. Calculation of the actual dABCD range from the measured rel
ative phase offset6. Localization algorithm
Korea Advanced Institute of Science and Technology