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 whichsets a correction node near the blind nodes and applies the correction factor and difference coefficient to correct the distancemeasurement results. In order to verify the performance of the algorithm, a simulation is implemented and the resultindicates that the modified algorithm can achieve a absolute error of 1.36m and a relative error of 1.91% in the range of100m×100m. Compared with the multilateral positioning algorithm, the existence of correction nodes in the algorithm canimprove both the absolute accuracy and relative accuracy of the wireless node localization with a better stability.
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