標題: Analysis and Visualization of Deep Neural Networks in Device-Free Wi-Fi Indoor Localization
作者: Liu, Shing-Jiuan
Chang, Ronald Y.
Chien, Feng-Tsun
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Wireless indoor localization;fingerprinting;channel state information (CSI);machine learning;deep neural networks (DNN);Internet of Things (IoT);visual analytics
公開日期: 1-Jan-2019
摘要: Device-free Wi-Fi indoor localization has received significant attention as a key enabling technology for many Internet of Things (IoT) applications. Machine learning-based location estimators, such as the deep neural network (DNN), carry proven potential in achieving high-precision localization performance by automatically learning discriminative features from the noisy wireless signal measurements. However, the inner workings of the DNNs are not transparent and not adequately understood, especially in the indoor localization application. In this paper, we provide quantitative and visual explanations for the DNN learning process as well as the critical features that the DNN has learned during the process. Toward this end, we propose to use several visualization techniques, including 1) dimensionality reduction visualization, to project the high-dimensional feature space to the 2D space to facilitate visualization and interpretation, and 2) visual analytics and information visualization, to quantify relative contributions of each feature with the proposed feature manipulation procedures. The results provide insightful views and plausible explanations of the DNN in device-free Wi-Fi indoor localization using the channel state information (CSI) fingerprints.
URI: http://dx.doi.org/10.1109/ACCESS.2019.2918714
http://hdl.handle.net/11536/152322
ISSN: 2169-3536
DOI: 10.1109/ACCESS.2019.2918714
期刊: IEEE ACCESS
Volume: 7
起始頁: 0
結束頁: 0
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