algorithm

This paper improves the RSSI localization algorithm, integrates the idea of one-dimensional linear positioning, and proposes to use distance ratio method for locating unknown nodes. The improve algorithm's main principle is to receive signal of wireless sensor nodes to calculate the distance between nodes and base stations and carry out empirical analysis of the distance ratio to reflect the distance between the node location. The improved algorithm uses different measuring methods, and makes it more suitable in mine roadway and mining face one-dimensional linear environment. In the end. on the condition of one dimension, we carry out the MATLAB algorithms emulate and Mica2 node experiment, and results show that the improved algorithm is more adaptive to the environment changing. The positioning accuracy is almost not changed when the environment changes. The result has shown good reliability and applicability.