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Öğe Motor Imagery Signal Classification Using Constant-Q Transform for BCI Applications(European Signal Processing Conference, EUSIPCO, 2021) Balim, Mustafa Alper; Hanilçi, Cemal; Acir, NurettinElectroencephalography (EEG) signals have been using for brain-computer interface applications for the last two decades. Motor imagery (MI) signals are one of the EEG signal types formed by imagining a limb's movement. Recently with the help of deep neural networks (DNN) for classifying MI signals using time-frequency (TF) features, considerable performance improvement has been reported. This paper proposes using a well-known TF representation technique called Constant-Q Transform (CQT) for the MI signal classification. Experiments conducted on BCI IV 2b dataset with DNN classifier using CQT spectrogram show that CQT outperforms traditional short-time Fourier transform (STFT) representation.
