Adaptive Sleep/Wake Classification Based on Cardiorespiratory Signals for Wearable Devices. Karlen, W., Mattiussi, C., & Floreano, D. In 2007 IEEE Biomedical Circuits and Systems Conference, pages 203-6, 11, 2007. IEEE.
Adaptive Sleep/Wake Classification Based on Cardiorespiratory Signals for Wearable Devices [link]Website  abstract   bibtex   1 download  
In this paper we describe a method to classify online sleep/wake states of humans based on cardiorespiratory signals for wearable applications. The method is designed to be embedded in a portable microcontroller device and to cope with the resulting tight power restrictions. The method uses a Fast Fourier Transform as the main feature extraction method and an adaptive feed-forward Artificial Neural Network as a classifier. Results show that when the network is trained on a single user, it can correctly classify on average 95.4% of unseen data from the same user. The accuracy of the method in multi-user conditions is lower (89.4%). This is still comparable to actigraphy methods, but our method classifies wake periods considerably better.
@inProceedings{
 title = {Adaptive Sleep/Wake Classification Based on Cardiorespiratory Signals for Wearable Devices},
 type = {inProceedings},
 year = {2007},
 identifiers = {[object Object]},
 keywords = {EMG,EOG,actigraphy,adaptive feed-forward network,adaptive sleep-wake classification,artificial neural network,biomedical electronics,biomedical equipment,biomedical signal analysis,cardiorespiratory signal,classification,electro-oculography,electrocardiography,electromyography,fast Fourier transform,fast Fourier transforms,feature extraction,feedforward neural nets,medical signal processing,microcontrollers,neural classifier,neurophysiology,pneumodynamics,portable microcontroller device,respiratory effort,signal classification,signal classifier,sleep and wake,sleepECG,wearable computing,wearable device},
 pages = {203-6},
 websites = {http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4463344},
 month = {11},
 publisher = {IEEE},
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 created = {2009-05-29T19:40:42.000Z},
 accessed = {2012-11-21},
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 profile_id = {6d353feb-efe4-367e-84a2-0815eb9ca878},
 last_modified = {2014-11-28T11:16:47.000Z},
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 citation_key = {Karlen2007},
 source_type = {article},
 abstract = {In this paper we describe a method to classify online sleep/wake states of humans based on cardiorespiratory signals for wearable applications. The method is designed to be embedded in a portable microcontroller device and to cope with the resulting tight power restrictions. The method uses a Fast Fourier Transform as the main feature extraction method and an adaptive feed-forward Artificial Neural Network as a classifier. Results show that when the network is trained on a single user, it can correctly classify on average 95.4% of unseen data from the same user. The accuracy of the method in multi-user conditions is lower (89.4%). This is still comparable to actigraphy methods, but our method classifies wake periods considerably better.},
 bibtype = {inProceedings},
 author = {Karlen, Walter and Mattiussi, Claudio and Floreano, Dario},
 booktitle = {2007 IEEE Biomedical Circuits and Systems Conference}
}

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