Positioning Technology Based on RSSI in Coal Mine

This paper describes wireless signal strength based on WLAN positioning technology in coal mine.Firstly,it analyzes the difference of radio channel mode between transmitted in coal mine and transmitted on the ground.After that,it introduces an establishment method of radio signal map which is combined experiences database with estimations database.Finally,it turned out that the positioning accuracy is improved efficiently by introducing into weighting algorithm,which can satisfy production request in coal mine.