The invention discloses a
motor imagery electroencephalogram
signal decoding method and
system, and the method comprises the steps: obtaining the
time sequence data of each channel of a
motor imagery electroencephalogram
signal, carrying out the averaging of the
time sequence data along the time dimension, obtaining the features after the
time average pooling, carrying out the
standardization of the features in the channels, and obtaining the
time sequence data of each channel of the
motor imagery electroencephalogram
signal.
Gaussian weighting coefficients are generated through
Gaussian weighting
harmonic, the coefficients are broadcasted along the time dimension, weights matched with the time dimension are obtained, the weights and the motor imagery electroencephalogram signals are multiplied
element by element, and the dynamically
harmonic motor imagery electroencephalogram signals are obtained. Extracting multi-channel multi-scale spatial-temporal features of the signal, windowing a feature sequence, constructing a
feature vector with a
fixed length, and performing classification through a classifier to obtain a probability corresponding to each predefined motor imagery category; according to the method, the decoding performance can be effectively improved through
cooperative work of adaptive coordination, feature heterogeneous fusion and channel attention optimization of the motor imagery electroencephalogram signals.