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Novel use of Empirical Mode Decomposition in single-trial classification of motor imagery for use in brain-computer interfaces
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Davies, Simon R. H. and James, Chris (2013) Novel use of Empirical Mode Decomposition in single-trial classification of motor imagery for use in brain-computer interfaces. In: 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2013 , Osaka, 3-7 July 2013 pp. 5610-5613. doi:10.1109/EMBC.2013.6610822
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Official URL: http://dx.doi.org/10.1109/EMBC.2013.6610822
Abstract
This paper presents a novel method, based on multi-channel Empirical Mode Decomposition (EMD), of classifying the electroencephalogram (EEG) recordings of imagined movement by a subject within a brain-computer interfacing (BCI) framework. EMD is a technique that divides any non-linear or non-stationary signal into groups of frequency harmonics, called Intrinsic Mode Functions (IMFs). As frequency is a key component of both IMFs and the μ rhythm (8-13 Hz brain activity generated during motor imagery), IMFs are then grouped by frequency. EMD is applied to the recordings from two electrodes for each trial and the resulting IMFs are grouped according to peak-frequency band via Hierarchical Clustering Analysis (HCA). The cluster containing the frequency band of the μ rhythm (8-13 Hz) is then selected and the sum-total of the IMFs from each electrode are summed together. A simple linear classifier is then sufficient to classify the motor-imagery with 89% sensitivity from a separate test set.
Item Type: | Conference Item (Paper) | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Publisher: | IEEE Computer Society | ||||
Book Title: | 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) | ||||
Official Date: | July 2013 | ||||
Dates: |
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Page Range: | pp. 5610-5613 | ||||
DOI: | 10.1109/EMBC.2013.6610822 | ||||
Status: | Not Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2013 | ||||
Type of Event: | Conference | ||||
Location of Event: | Osaka | ||||
Date(s) of Event: | 3-7 July 2013 |
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