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The Research of Sampling Model Method to Location Estimation and Location Estimation System

Author: ZuoJunChao
Tutor: XieZuo
School: Zhengzhou University
Course: Applied Computer Technology
Keywords: Location estimate Sampling model ZigBee Wireless sensor networks
CLC: TN929.5
Type: Master's thesis
Year: 2010
Downloads: 20
Quote: 0
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With the development of wireless network technology, Wi-Fi-based location-based services to provide more added value. In a wireless network based on the signal reaches the time or the signal phase positioning technology requires specialized hardware support and signal strength value in the existing wireless network can provide. Positioning method based on signal strength. 2.4G wireless sensor network node localization problem in the complex electromagnetic environment, this paper, based on the positioning of the sampling model estimation method so that the reflected signal is affected by the environment caused by attenuation and the surrounding environment is reflected in the sampling model model, thereby improving the positioning accuracy. With this method in the ZigBee network established test Positioning System The system consists of positioning in wireless sensor networks and PC software, you can determine the location of the mobile node in the network. The main contents are: a wireless network positioning technology Research, introduced the main location estimation methods, such as the positioning method based on signal strength, signal arrival time-based positioning method, based on the signal reaches the angle positioning method; research model of the actual environment of the network signal strength; sampling model positioning estimation method; This method is based on the spatial location of the grid, the use of sampling methods to establish a template data, sampling data template measured point estimated in order to improve the surrounding environment on the accuracy of the estimated position results. Detailed sampling modeling process and theoretical basis, as well as how to use the method of sampling model position estimate; wireless sensor networks using ZigBee technology Soc module formed the modeling process and the results were achieved and tested positioning system software architecture and the design and implementation of the various parts of the points; positioning software running on a PC, the establishment of a practical wireless sensor network positioning system, and apply this method of sampling model experiment verification, test data and results analysis in a laboratory environment. Experimental results show that the method can be realized in the existing network positioning function, and has a good adaptability and positioning accuracy.

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