Research Of Positioning Algorithm Based On ZigBee

The wireless sensor networks has made a rapid development as long as the continueprogressing of the Internet of Thing technology in recent years. Such as ZigBee wirelesssensor network,The application of which has become widespread in the field of wirelesssensor technology. We can monitor the physical information of the various points in thesensor network through a large number of randomly distributed wireless sensor nodes.Andgot this information need to take the node position information together in practicalapplication.That requires effective monitoring function,and also position of any networdnode. It becomes the virial importence of the wireless position.The traditional wireless positioning algorithm has two categories.One is based onranging,such as TOA, TDOA, AOA, RSSI. The other is based on the non-ranging,forexample the Geometric centroid position algorithm, APIT, DV-Hop. Ranging-basedwireless position algorithm has a large cost to achieve and power consumption, but higherprecision. Wireless position algorithm based on non-Ranging has low precision generaly,and requires the number of anchor nodes exactly high, but little cost to achieve.That satisfythe low power requirements of wireless sensor networks. On the basis of the analysis andcomparison of the above algorithms, To position blind node combined with APITalgorithm and Dv-Hop localization algorithm.according to the characteristics of theZigBee sensor network and the density of anchor node, Also to improve the positioningaccuracy using the ZigBee and RSSI measurement value on the node APIT algorithm andDV-Hop algorithm weighting process,.Finally, The improved algorithm is proved to be effective by experiments and Matlabmodeling simulation.