Research And Implementation Of WSN Localization System Based On ZigBee

Wireless sensor network ,which directly perceived the objective world ,had changed the way that humans interact with the natural world. However, it was only meaningful that the data collected by wireless sensor network applications must be correspond to the node itself, so localizaiton had become one of the most critical technologies of sensor network applications. Meanwhile, with low-cost, low power ZigBee technology rising, Wireless Sensor Networks based on Zigbee was a growing concern.The paper made WSN localization system based on Zigbee as the main content of it.Firstly,this paper introduced the background and status quo of WSN localization,as well as ZigBee communication protocol and discussed about the theory concerning WSN localization on the basis of the study of a lot of related literatures. The signal strength based localization technology was made as the main point of this paper.Secondly, A kind of optimizing RSSI algorithm based on Gaussian models was brought forward in the paper after the analysis of the advantages and disadvantages of the localization algorithms in existence,wireless loss model,RSSI ranging and the factors that affected the RSSI ,as well as the analysis of the two algorithm models. The algorithm could effectively anti-jam and improved localization accuracy. This paper described the localization algorithm process detaily and verified it through experiments.Finally, The paper designed a low-power, high performance localization system for wireless sensor networks which realized the combination of wireless location and cable communications. The localization methods mentioned above was applied in the system to get the location results. The paper analyzed the present problems as well as the next step prospect.The localization method given by this paper reduced the influence of the interference, non line of sight, etc to improve the localization accuracy and reduced the instability of transmission in the long-distance communication. The localization system ran in a good condition in the real application.