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A common spatial mode method based on phase-locked modulation of EEG signals

A common space mode, phase-locked modulation technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of not considering the characteristics of EEG signals, the algorithm is not stable enough, and the interpretability is not strong.

Inactive Publication Date: 2019-01-15
FOSHAN UNIVERSITY
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Problems solved by technology

However, there are some deficiencies in the existing methods. For example, there are many parameters in LTCSP, involving more artificial settings, and the algorithm is not stable enough; while LTCCSP uses correlation coefficients to define weights, without considering the inherent characteristics of EEG signals. Neurophysiological explanation Sex is not strong

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  • A common spatial mode method based on phase-locked modulation of EEG signals
  • A common spatial mode method based on phase-locked modulation of EEG signals
  • A common spatial mode method based on phase-locked modulation of EEG signals

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Embodiment Construction

[0027] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without making creative efforts all belong to the protection scope of the present invention. In addition, all the connection / connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the invention can be combined interactively on the premise of not conflicting with each oth...

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Abstract

The invention discloses a common spatial mode method based on phase-locked modulation of EEG signals, which introduces phase synchronization information into the traditional common spatial mode. In neuroscience, phase synchronization exists in the communication of neural activities, and the weighting of the phase synchronization information has good neurophysiological interpretability. In mathematical expression, in the manifold expression of covariance matrix of common spatial pattern, a new spatio-temporal filter is formed by weighting the phase-locked value of EEG signal. Using the proposedmethod to extract EEG signal features, a single-trial EEG signal classification experiment is carried out, and the classification accuracy and robustness are better than the traditional methods.

Description

technical field [0001] The invention belongs to the field of brain-computer interfaces (BCI), and in particular relates to feature extraction and classification of EEG signals of motor imagery tasks. Background technique [0002] As the basic unit of information processing in the human brain, neuron cells will generate bioelectrical activity when receiving internal and external stimuli. And when many neurons cluster discharge, they push the metal electrons in the electrodes located on the scalp, so that a voltage difference is formed between the two electrodes, so that electroencephalograph (EEG) signals of different rhythms can be recorded. EEG signals contain the activity state information of the human brain to a certain extent, but EEG signals have non-stationarity, randomness, and low signal-to-noise ratio, which makes the BCI system based on EEG signals challenging. The key technology of BCI is how to effectively extract the features of EEG signals, and then obtain a g...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06F2218/08G06F2218/12
Inventor 王海贤方娜张友红
Owner FOSHAN UNIVERSITY
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