WIRELESS SENSOR NODE POSITION TRACKING METHOD USING PROBABILITY FILTERING OF RF RECEIVED SIGNAL STRENGTH

摘要

PURPOSE: A wireless sensor node position tracking method using probability filtering of RF received signal strength is provided to improve accuracy without the additional computational complexity and the complexity increment. CONSTITUTION: The wireless sensor node includes the line transceiver(30), the controller(20) including the frequency distribution table, and the radio frequency unit(RF)(40) and the external memory units(50,60). The stochastic filtering of the radio signal strength for tracing the location of the radio frequency sensor node is used. The RSSI(Received Signal Strength Indication) value is received through the signal transmit receive process. The frequency distribution table of the received RSSI value is confirmed. If the count number is 50 times, the received RSSI value becomes sorting.