A 2.45-GHz RFID wireless-sensor-network location tracking system

A radio frequency identification (RFID) wireless-sensor-network location tracking system was implemented by the wireless communication technology (WCT), micro-sensors and location tracking algorithm (LTA), and developed to be a network node communication system. The space signal attenuation model (SAM), received signal strength indicator (RSSI), link quality indicator (LQI), and network node location calculus (NNLC) were adopted in this system. The RFID WSN system provided real-time position for object recognition, and return the information as an object path information was recorded on the sensors. The Non-open signal attenuation model can reduce the error of the non-open space in the cement and metal building materials. The system used active RFID Tags. The system with a non-open-space signal attenuation model and an object localization algorithm demonstrated 100% identification capability in a non-open space with a radius of 5 meters. According to the results of experiments, the improvement over 34% was achieved compared with the conventional systems.