Physics Journal
Articles Information
Physics Journal, Vol.7, No.1, Mar. 2021, Pub. Date: Apr. 16, 2021
Improved Algorithm of WiFi Fingerprint Location Based on Signal Strength
Pages: 1-4 Views: 238 Downloads: 100
[01] Yonghao Zhao, School of Computer Science and Technology, Nanjing University of Technology, Nanjing, China; School of Information Engineering, Yancheng Teachers University, Yancheng, China.
With the development of information technology, the basic improvement of network infrastructure and the rapid development of mobile network, the development direction of the world economy and people's thinking and way of life have undergone tremendous changes due to the rapid development of wireless technology. Nowadays, people's demand for location services is increasing. Compared with outdoor GPS navigation systems, indoor positioning technology still has a long way to go. Indoor positioning is a hot issue in navigation technology. In recent years, many indoor positioning technologies have been proposed. And location fingerprint positioning is a commonly used technology. Among them, the positioning algorithm using KNN is the most classic positioning method. Due to the complexity of the environment, the concept of weight is introduced on the basis of the KNN algorithm, which alleviates the impact of different environments to a certain extent. This paper proposes a new and improved algorithm based on the KNN algorithm. In order to fully consider the complexity of the environment, the fingerprint data is preprocessed to eliminate the interference of abnormal signal values firstly, and then a new weight method is introduced to weight the KNN algorithm. The experimental results show that this method can further improve the positioning accuracy.
Indoor Positioning, Location Fingerprint, KNN Algorithm, Improved Weighting
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