Study of Wireless Sensor Network Localization Algorithm Based on RSSI

Path loss for radio-wave propagation is transformed into distance according to theoretic or empirical model based on range measurement of RSSI(Received Signal Strength Indicator).In the actual application environment,because of multi-path,diffraction,obstacles and other factors,path loss error resulted in the positioning error.The new location algorithm ERSS based on RSSI was proposed by analysing error region produced during two-dimension space localization.Simulation results show that the ERSS algorithm has achieved more noticeable progress than common RSSI algorithm,improving the accuracy of estimates of the distance,and suitable for the requirements of wireless sensor network'lower communication costs and lower hardware requirements.