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Study on WSN Localization Technology Based on ZigBee

Author: LiWanChang
Tutor: LiYanPing
School: Taiyuan University of Technology
Course: Communication and Information System
Keywords: zigBee TDOA RSSI Wireless sensor networks Node localization
CLC: TP212.9
Type: Master's thesis
Year: 2011
Downloads: 369
Quote: 2
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Abstract


Positioning technology was first produced in the United States due to the needs of the military war. However, in recent years, with the development of social needs, plus all the benefits of positioning technology has been widely used in the monitoring of environmental parameters in addition to military applications other than the crop growth status monitoring, automatic target tracking and so on. U.S. GPS and Russian GLONASS technology is currently the world's most mature global, full range of positioning and navigation system. The two positioning technology in the current most widely used, but there are some shortcomings and deficiencies. Similar to the underground mines and indoor positioning, special environment, satellite global positioning system is not able to give full play to the role, can not even play its positioning function. There is a demand, there will be a market, there are problems there will be a solution. At this time you can use the WSN-based positioning technology to make up for the shortcomings and deficiencies of the satellite positioning. In the promotion of the market, in order to facilitate the implementation and application of WSN positioning function, ZigBee technology appears and flourish, is what we call the bee dance techniques. ZigBee technology is mainly used in LAN communications, is a self-organizational capacity is very strong communication technology. Implementation of this technology is based on a highly integrated positioning chips. These highly integrated modules, highly integrated WSN networking and positioning functions required for a variety of devices. The bee dance techniques in terms of hardware which greatly facilitates the realization of the positioning function. In this paper, based on the ZigBee module CC2430 positioning node brief introduction, while the design of a typical node circuit. Implementation of the positioning function requires not only the hardware basic support, also need localization algorithm for computing the results of specific positioning. For positioning algorithm is varied, have their own advantages. Localization algorithm can be divided into macro based on the measured distance and are not based on measurements from the two. This paper describes several typical positioning ranging RSSI, TOA, TDOA, AOA-based algorithm. Adapt to the WSN energy consumption, the use of environmental characteristics of the premise, a new positioning algorithm, not only solved the TDOA algorithm two points of intersection of the problem, and to improve the positioning accuracy. In this thesis, the following work: 1) study the basic structure of the bee dance WSN-based and network build, describes the value and advantages of the applications of WSN, broad application prospects. 2) to study the advantage of the characteristics of WSN, analyzed and compared based on measuring the distance of the four positioning algorithm selected two suitable for WSN localization algorithms for further learning. 3) on the basis of in-depth study of two algorithms suitable for WSN, the combined average of the two algorithms algorithm. 4) the mean value algorithm performance simulation, and its performance is compared to other single algorithm, positioning accuracy is significantly higher than that of a single algorithm. 5) A preliminary study the WSN node ZigBee module positioning system, typical circuit node.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Sensor applications
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