BCI Competitions III Result

Dataset I


ZHOU zongtan, LIU Yang, HU Dewen

Department of Automatic Control,
National University of Defense Technology,
Changsha, Hunan, 410073, P.R.C.
narcz@163.com


Algorithm description:

Preprocessing:
1) Filter signals using a lowpass 30Hz filter and a highpass 5Hz filter. 
2) Compute CSP(Common Spatial Pattern) using training data to reduce the dimensions from 118 channels to 12 channels.


Feature extracting:
1) Compute continuous wavelet transformation(4~24Hz corresponded) of every trials to generate a 2D time-frequency array.
2) Compute a two samples t-Test statistic on every time-frequency point.
3) Construct features using sum of the cwt coefficients weighted by the t-value.


Classifying:
Classify using a linear discriminant analysis(LDA).