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Unsupervised View-Selective Deep Learning for Practical Indoor Localization Using CSI
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DOI：10.1109/JSEN.2021.3112994.png)
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摘要
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Due to its high-dimensional data characteristics, the channel state information (CSI) of Wi-Fi signals has become a strong candidate for use in indoor localization. In addition, machine learning techniques can improve the accuracy of indoor localization systems using multiview CSI data received at multiple access points (APs). However, in complex environments, most CSI views collected at APs in non-line-of-sight (NLoS) configurations relative to a transmitter may lose so much useful data information as to become nonsalient. In this paper, we propose a practical machine learning approach named unsupervised view-selective deep learning (UVSDL), in which only the most salient CSI view is selected in an unsupervised manner to be applied in regression for localization. In an experiment in a complex building, our variational deep learning (VDL)-based regression method with the most salient CSI view achieves a localization accuracy of 1.36 m, significantly outperforming the best-known system BiLoc by 25 %.
Keyword:
Location awareness
Machine learning
Feature extraction
Training
Deep learning
Antenna measurements
Receiving antennas
Indoor localization system
channel state information (CSI)
multiview data
complex building environment
machine learning
variational deep learning
unsupervised clustering
salient view selection
期刊
IF:
4.5
论文数:
2.2W
被引数:
7.3W
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