RSSI localization method for mine underground based on RSSI hybrid filtering algorithm

Aiming at the coal mine personnel positioning method based on wireless sensor network technology, contrasting with advantage of now-existing feasible methods, consulting with traditional trilateral positioning, this paper proposed weighted trilateral localization method based on RSSI ranging. In order to ensure the precision of distance measurement, analysis the cause of error of RSSI, improved the performance of the linear discrete kalman filter, to propose hybrid filtering algorithm. The simulation shows that the improved method has effectively reduce the positioning error and improve the personnel positioning accuracy.