Design of a low-power on-body ECG classifier for remote cardiovascular monitoring systems

Chen, Taihai, Mazomenos, Evangelos B., Maharatna, Koushik, Dasmahapatra, Srinandan and Niranjan, Mahesan (2013) Design of a low-power on-body ECG classifier for remote cardiovascular monitoring systems IEEE Journal of Emerging and Selected Topics in Circuits and Systems, 3, (1), pp. 75-85. (doi:10.1109/JETCAS.2013.2242772).


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In this paper we first present a detailed study on the trade-off between the computational complexity (directly related to the power consumption) and classification accuracy for a number of classifiers for classifying normal and abnormal ECGs. In our analysis we consider the spectral energy of the constituent waves of the ECG as the discriminative feature. Starting with the exhaustive exploration of single heart-beat based classification to ascertain the complexity-accuracy trade-off in different classification algorithms, we then extend our study for multiple heartbeat based classification. We use data available in Physionet as well as samples from Southampton General Hospital Cardiology Department for our investigation. Our primary conclusion is that a classifier based on Linear Discriminant Analysis (LDA) achieves comparable level of accuracy to the best performing Support Vector Machine (SVM) classifiers with advantage of significantly reduced computational complexity. Subsequently, we propose an ultra low-power circuit implementation of the LDA classifier that could be integrated with the ECG sensor node enabling on-body normal and abnormal ECG classification. The simulated circuit is synthesized at 130 nm technology and occupies 0.70 mm² of silicon area (0.979 mm² after Place and Route) while it consumes 182.94nW @ 1.08 V, estimated with Synopsys PrimeTime when operating at 1 KHz. These results clearly demonstrate the potential for low-power implementation of the proposed design.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1109/JETCAS.2013.2242772
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Q Science > QP Physiology
R Medicine > RB Pathology
Organisations: Electronic & Software Systems
ePrint ID: 347400
Date :
Date Event
26 February 2013e-pub ahead of print
March 2013Published
Date Deposited: 06 Feb 2013 12:22
Last Modified: 17 Apr 2017 16:10
Further Information:Google Scholar

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