Design of an Online Brain-Computer Interface System Based on Field Programmable Gate Array

In the article, an online brain-computer interface (BCI) demo system based on Field Programmable Gate Array (FPGA) was designed. A colour visual stimulator based on a Video Graphics Array (VGA) monitor controlled by FPGA is designed to produce transient visual stimulations. An electroencephalography...

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Veröffentlicht in:Journal of physics. Conference series Jg. 1624; H. 4; S. 42061 - 42068
Hauptverfasser: Feng, Zhengquan, Zeng, Lin, Wu, Haijing, Tian, Fengchun, He, Qinghua
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Bristol IOP Publishing 01.10.2020
Schlagworte:
Circuits
Controllers
Converters
Electroencephalography
Electronic devices
Field programmable gate arrays
Human-computer interface
Impulse response
Microprocessors
Physics
Signal processing
Stimulators
Target recognition
Template matching
Visual signals
ISSN:1742-6588, 1742-6596
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Zusammenfassung:In the article, an online brain-computer interface (BCI) demo system based on Field Programmable Gate Array (FPGA) was designed. A colour visual stimulator based on a Video Graphics Array (VGA) monitor controlled by FPGA is designed to produce transient visual stimulations. An electroencephalography (EEG) acquisition module including active electrodes and driven-right-leg circuit is used to acquire the visual evoked potential (VEP) signal; Finite impulse response (FIR) filtering combined with an averaging method allows for extraction of the weak VEP signals. The template matching method is used in target identification. The FPGA is successfully used in the BCI system to complete multiple tasks such as the VGA controller, analog to digital (AD) converter controller, VEP signal processor and electronic device controller. Experiments show that the subjects' transient VEP can successfully activate the electronic devices by the online BCI system which has relatively high identification accuracy. All these results show that the real time BCI demo system based on FPGA is feasible and effective.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1624/4/042061