Compressive Representation for Device-Free Activity Recognition with Passive RFID Signal Strength

Yao, Lina and Sheng, Quan Z. and Li, Xue and Gu, Tao and Tan, Mingkui and Wang, Xianzhi and Wang, Sen and Ruan, Wenjie (2018) Compressive Representation for Device-Free Activity Recognition with Passive RFID Signal Strength. IEEE Transactions on Mobile Computing, 17 (2). pp. 293-306. ISSN 1536-1233

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Abstract

Understanding and recognizing human activities is a fundamental research topic for a wide range of important applications such as fall detection and remote health monitoring and intervention. Despite active research in human activity recognition over the past years, existing approaches based on computer vision or wearable sensor technologies present several significant issues such as privacy (e.g., using video camera to monitor the elderly at home) and practicality (e.g., not possible for an older person with dementia to remember wearing devices). In this paper, we present a low-cost, unobtrusive, and robust system that supports independent living of older people. The system interprets what a person is doing by deciphering signal fluctuations using radio-frequency identification (RFID) technology and machine learning algorithms. To deal with noisy, streaming, and unstable RFID signals, we develop a compressive sensing, dictionary-based approach that can learn a set of compact and informative dictionaries of activities using an unsupervised subspace decomposition. In particular, we devise a number of approaches to explore the properties of sparse coefficients of the learned dictionaries for fully utilizing the embodied discriminative information on the activity recognition task. Our approach achieves efficient and robust activity recognition via a more compact and robust representation of activities. Extensive experiments conducted in a real-life residential environment demonstrate that our proposed system offers a good overall performance and shows the promising practical potential to underpin the applications for the independent living of the elderly.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Transactions on Mobile Computing
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2208
Subjects:
ID Code:
134532
Deposited By:
Deposited On:
22 Jun 2019 09:10
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Nov 2020 07:27