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Kid Net Project: Signal Strength based Orientation Discovery

Kid Net Project: Signal Strength based Orientation Discovery. Group Members Saleel Kudchadker Sushma Myneni. Agenda. Project Goals Introduction to Project Project Details Problems Faced Results Goals Not Achieved. Project Goals.

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Kid Net Project: Signal Strength based Orientation Discovery

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  1. Kid Net Project: Signal Strength based Orientation Discovery Group Members Saleel Kudchadker Sushma Myneni

  2. Agenda • Project Goals • Introduction to Project • Project Details • Problems Faced • Results • Goals Not Achieved

  3. Project Goals • Providing a facing direction measurement system of a sensor with another • Use metrics such as Signal Strength, Packet error rate to estimate orientation • Generate MATLAB model to estimate orientation

  4. Project Details and Assumptions • Assumptions • Kids are in close proximity with in 1.5 ft • Antenna of the motes are not covered • Project Details • Readings were taken at multiples of 90º angles • Telos B mote is mounted vertically

  5. Project Details • We have used Telos B motes in our experiments • We have used the internal antenna (F-inverted) present on the PCB • Radiation pattern of the F-inverted (vertical mounting) is not perfectly Omnidirectional

  6. Evaluation Setup Sensor 3 0º 90º 180º 270º Sensor 4 Sensor 2 Sensor 0 0º 90º 180º 270º 0º 90º 180º 270º 0º 90º 180º 270º Sensor 1 0º 90º 180º 270º

  7. Evaluation Setup Sensor 3 0º 90º 180º 270º Sensor 4 Sensor 2 Sensor 0 0º 90º 180º 270º 0º 90º 180º 270º 0º 90º 180º 270º Sensor 1 0º 90º 180º 270º

  8. Evaluation Setup Sensor 3 0º 90º 180º 270º Sensor 4 Sensor 2 Sensor 0 0º 90º 180º 270º 0º 90º 180º 270º 0º 90º 180º 270º Sensor 1 0º 90º 180º 270º

  9. Evaluation Setup Sensor 3 0º 90º 180º 270º Sensor 4 Sensor 2 Sensor 0 0º 90º 180º 270º 0º 90º 180º 270º 0º 90º 180º 270º Sensor 1 0º 90º 180º 270º

  10. Problems faced • Omni-directional antenna of telos B needs analysis of radiation pattern • Multipath problems resulted in erroneous results • Packet error rate is very high even at shorter range like 1feet

  11. Results • Matlab model takes the radiation pattern and RSSI values to calculate angle of orientation which agrees with experimental setup

  12. Goals not achieved • Unable to include packet error rate metric • Experiment was not conducted by varying the height • Experiment was conducted only indoors

  13. Questions?

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