Research on ZigBee Indoor Technology Positioning Based on RSSI

Abstract Because in the indoor environment, GPS and other navigation satellite signals can not penetrate the building well, making the satellite signal weaker and unable to use the satellite for positioning. A received signal strength indication (RSSI) -based wireless ZigBee sensor network is proposed based on ranging and indoor positioning technology. The module CC2431 is used as the core chip to design ZigBee nodes which are used to form a ZigBee positioning network. According to the receiver RSSI model, the distance d is estimated between the unknown node and the reference node. By introducing the average filtering model and the Gaussian filtering model, then the measured formula of RSSI ranging is obtained, which is RSSI=-34.3-24×lgd. The field test experiment shows that under the condition of quickly locate and low accuracy, the proposed method does not require additional hardware and software, meanwhile is simple to be implemented.