| Summary: | 碩士 === 朝陽科技大學 === 資訊與通訊系 === 106 === Due to smart phones are widely used in indoor positioning services, making the indoor positioning accuracy increasingly important. The most commonly used GPS is not available in the indoor environment, while most other indoor positioning techniques have the disadvantage of high errors or attaching some extra and special hard equipment. This thesis proposes an algorithm to change the environmental attenuation factor and compensation mechanism according to the current situation of the environment, and reduce the signal anomaly caused by the decrease of positioning accuracy. The method consists of three stages: First, calculate the current environmental attenuation factor by distance and signal. Secondly, compensate the lack of signal distance according to the compensation mechanism. Finally, the triangulation method and the corrected distance estimation are used to positioned result. The experimental results show that the average positioning error of the proposed method is less than 0.5 meter, which is better than some existing indoor positioning methods, and system provides accuracy and practicality. The research results show that the environmental attenuation factor (n) is very important to the accuracy of indoor positioning, and the suitable environment attenuation factor is render in different environments, which can effectively improve the accuracy of positioning.
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