| Summary: | 碩士 === 崑山科技大學 === 電機工程研究所 === 98 === The paper proposes a wireless sensor network used in the positioning algorithm. The positioning algorithm is mainly for indoor environments. In wireless sensor networks, target location is very important in wireless sensor network applications. Global Positioning System (GPS) Because of its high cost and high energy consumption is not suitable for low-cost and low energy consumption in wireless sensor networks. In the research methods used in measuring distance into ways and means of measuring angles in order to achieve better accuracy of the basic range (Range-based) and use the received signal does not support basic range (Range-free).The scope of the basic need to use costly special hardware to achieve good accuracy. On the other hand, there is no basis for the scope of use only to receive signals to aid positioning, the accuracy difference.
This thesis improve position accuracy without using special hardware to do it, this thesis proposed a system combining Received Signal Strength Indicator (RSSI) signal overlap region have the algorithm calculate the target location. Use Agreement with the ZigBee wireless communication standard ZigBee location system. Indoor environment in four reference nodes placed sensors, and then placed in the application area of mobile nodes, positioning measurements. The positioning accuracy can be improved while increasing the number of reference nodes in the indoor environment to improve the accuracy of the results.
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