Paper Info
Title
Location- and Person-Independent Activity Recognition with WiFi, Deep Neural Networks, and Reinforcement Learning
Abstract
AbstractIn recent years, Channel State Information (CSI) measured by WiFi is widely used for human activity recognition. In this article, we propose a deep learning design for location- and person-independent activity recognition with WiFi. The proposed design consists of three Deep Neural Networks (DNNs): a 2D Convolutional Neural Network (CNN) as the recognition algorithm, a 1D CNN as the state machine, and a reinforcement learning agent for neural architecture search. The recognition algorithm learns location- and person-independent features from different perspectives of CSI data. The state machine learns temporal dependency information from history classification results. The reinforcement learning agent optimizes the neural architecture of the recognition algorithm using a Recurrent Neural Network (RNN) with Long Short-Term Memory (LSTM). The proposed design is evaluated in a lab environment with different WiFi device locations, antenna orientations, sitting/standing/walking locations/orientations, and multiple persons. The proposed design has 97% average accuracy when testing devices and persons are not seen during training. The proposed design is also evaluated by two public datasets with accuracy of 80% and 83%. The proposed design needs very little human efforts for ground truth labeling, feature engineering, signal processing, and tuning of learning parameters and hyperparameters.
Year
DOI
Venue
2020
10.1145/3424739
ACM Transactions on Internet of Things
DocType
Volume
Issue
Journal
2
1
ISSN
Citations 
PageRank 
2691-1914
2
0.37
References 
Authors
0
7
Name
Order
Citations
PageRank
MaYongsen120.37
ArshadSheheryar220.37
MunirajuSwetha320.37
TorkildsonEric420.37
RantalaEnrico520.37
Klaus Doppler61723153.67
Gang Zhou72597176.60