An RSSI-based Differential Correlation Algorithm for Wireless Node Localization

The wireless node localization is one of the most significant research issues in the field of wireless sensor networks.This paper presents an RSSI(Received Signal Strength Indicator)-based differential correlation algorithm which sets a correction node near the blind nodes and applies the correction factor and difference coefficient to correct the distance measurement results.In order to verify the performance of the algorithm, a simulation is implemented and the result indicates that the modified algorithm can achieve a absolute error of 1.36m and a relative error of 1.91% in the range of 100m×100m.Compared with the multilateral positioning algorithm, the existence of correction nodes in the algorithm can improve both the absolute accuracy and relative accuracy of the wireless node localization with a better stability.