Development of 3-Dimensional Sensor Nodes using Electro-magnetic Waves for Underwater Localization

수중 위치 추정을 위한 3차원 전자기파 센서 노드 개발

  • Received : 2012.12.03
  • Accepted : 2012.12.31
  • Published : 2013.02.01


In this paper, we discuss a 3-dimensional localization sensor node using EM waves (Electromagnetic waves) with RSSI (Received Signal Strength Indicator). Generally EM waves cannot be used in underwater environment, because the signal is highly attenuated by the water medium according to the distance. Although the signal quickly reduces in underwater, the reducing tendency is very clear and uniform. Hence EM waves have possibility as underwater distance sensors. The authors have verified the possibility by theory and several experiments, and developed calibration methods in case of linear and planer environment. For 3-dimensional localization in underwater, it must be known antenna's radiation pattern property in electric plane(called E-plane). In this paper, we proceed experiments to verify attenuation tendency with z axis movement, PLF (Polarization Loss Factor) and ILF (Inclination Loss Factor) with its theoretical approach.


underwater localization;RF;RSSI;antenna;electro-magnetic waves


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