Positioning Algorithm Of Wireless Sensor Network Research

As the research focus in the information area, the wireless sensor network involving interdisciplinary research field, and relates to a number of key technology is also to be related research development and further study. Wireless sensor networks can be widely applied in security monitoring, intelligent home furnishing, structural health monitoring, environmental monitoring, medical monitoring, earthquake monitoring and other fields. Wireless sensor network node localization in itself is one of the most basic functions, and it plays a key role in sensor network application. Determining the location information of the node is one of the key technology of sensor network.This paper mainly studies the two kinds of location algorithms, it is triangle centroid location algorithm and DV-Hop algorithm. After the detailed analysis of the two positioning algorithm, the improved algorithmsis are proposed.The main research contents are as follows:1. By analyze the DV-Hop(Distance Vector Hop), convex programming, MDS-MAP, APIT (Approximate PIT Test), RADAR positioning system and Cricket positioning system and soon to summarizes the advantages and disadvantages of the various algorithms.2. In view of the traditional triangle centroid location algorithm based on RSSI location and triangle centroid location algorithm in the calculation of distance between two nodes will produce different degree of positioning error, based on the RSSI distance calibration method based on triangle centroid location algorithm is improved, to get more effective positioning algorithm, so that the positioning performance can be improved, through MATLAB simulation analysis, validation improved localization algorithm.3. In the full study of traditional DV-Hop algorithm positioning principle and the error reason foundation, proposed the improvement DV-Hop positioning algorithm. In DV-Hop localization algorithm for third stage is also the location coordinates calculation stage, in order to reduce the calculation error on positioning accuracy, using regularization method for the calculation of the coordinates of the position. The traditional DV-Hop algorithm and the improved localization algorithm simulation analysis, verify improved localization algorithm.Finally through the simulation experiments validate the two improved in the positioning performance has relatively obvious improvement.