Rssi-based Indoor Positioning Algorithm Of Wireless Sensor Networks

The Wireless sensor network is a popular subject, the rise in recent yearsas use more and more widely in practical applications, many scholars andinstitutions into wireless sensor networks. Wireless sensor applications acrossvarious fields, set on fire in the forest, Which is particularly important inthe Geological Survey, industrial control and other fields. In wireless sensornetworks, location information is critical,to leave the location information,data-aware access to information also lost its significance. Based on the signalpropagation characteristics of wireless sensor,for the lack of existingresearch, based on the RSSI ranging model and a number of positioning algorithmresearch.The proposed positioning algorithm is divided into two stages, theRSSI-based ranging stage and location of the acquisition phase. RSSI time ofthe acquisition, according to the RF230data sheet on the platform do theappropriate settings in the serial RSSI output directly, and use the serialassistant displayed.Ranging stage, according to the principle of signal propagation, the useof indoor space propagation loss additional factor model, the model will signalpropagation of nonlinear auxiliary linear factor related to the distance. Theexperimental data show that the model is feasible.Positioning stage, combined with the electronic map matching algorithm,applied the algorithm of the positioning of the mesh topology, and experimentalresults show that improve the positioning accuracy of the positioning methodto a certain extent, meet the indoor positioning Finally, the analysis oftwo-dimensional positioning and three-dimensional locate the problems.