Abstract: Most of the existing path loss models of RSSI ranging rely on empirical models and have poor adaptability to the environment.Temperature variation is one of the main factors affecting RSSI observation and the accuracy of RSSI ranging.Therefore,the establishment of signal propagation path loss model including temperature correction term is the key to improve RSSI ranging accuracy in temperature variation environment.Based on the log-distance path loss model,two modeling methods of temperature correction which regard path loss index as a function of temperature and RSSI direct temperature correction are analyzed,and three specific temperature correction models of RSSI ranging are proposed.Using the measured data of RSSI from temperature variation experiment,the characteristics of RSSI with temperature variation are analyzed,and the RSSI ranging temperature correction models is established.The results show that the RSSI ranging temperature correction models established respectively by polynomial correction term and mixed correction term have high ranging correction accuracy,but with the distance between nodes increases,the modeling error increases.

Key words: RSSI ranging, temperature correction, ranging correction, ranging model