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  4. Removing Ocular Artifacts from EEG Signals Using Adaptive Filtering and ARMAX Modeling
 
conference paper

Removing Ocular Artifacts from EEG Signals Using Adaptive Filtering and ARMAX Modeling

Shooshtari, Parisa
•
Mohammadi, Gelareh  
•
Molaee Ardekani, Behnam
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2006
Proceeding of World Academy of Science, Engineering and Technology
International Conference on Computer Science, ICCS2006

EEG signal is one of the oldest measures of brain activity that has been used vastly for clinical diagnoses and biomedical researches. However, EEG signals are highly contaminated with various artifacts, both from the subject and from equipment interferences. Among these various kinds of artifacts, ocular noise is the most important one. Since many applications such as BCI require online and real-time processing of EEG signal, it is ideal if the removal of artifacts is performed in an online fashion. Recently, some methods for online ocular artifact removing have been proposed. One of these methods is ARMAX modeling of EEG signal. This method assumes that the recorded EEG signal is a combination of EOG artifacts and the background EEG. Then the background EEG is estimated via estimation of ARMAX parameters. The other recently proposed method is based on adaptive filtering. This method uses EOG signal as the reference input and subtracts EOG artifacts from recorded EEG signals. In this paper we investigate the efficiency of each method for removing of EOG artifacts. A comparison is made between these two methods. Our undertaken conclusion from this comparison is that adaptive filtering method has better results compared with the results achieved by ARMAX modeling.

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