Based on the energy detection of location research in wireless sensor network

The node localization is one of the key technologies in most applications of Wireless Sensor Networks (WSNs), moreover the error of distance measurements to some extent affected the nodes localization´s precision. Aiming at the influence of RF signal by various disturbing, which lead to ranging imprecise, this paper provided an improved limiting the average filtering algorithm (ILAFA), calibrated range measurement between nodes and optimization of beacon node in sensor network, then localizing nodes by using Weighted Least Square Estimates(WLSE). Experiments and simulations show that this algorithm improves the accuracy of estimates of distance and yields better performance than traditional RSSI trilateral algorithm in the same conditions.