Acousto-Optic Devices Application for Bioelectric Signals Wavelet Processing

摘要

Bioelectric signals processing is obligatory procedure which is inherent to all the systems providing diagnostics of human organism pathologies basing on the electric signals formed by cardiovascular system or cerebrum and central nervous system. Wavelet processing is one of the strongest methods of necessary information extraction from the recorded signals. A new method of wavelet processing performance has been proposed in the present paper. This method is based on the recently developed acousto-optic processing of bioelectric signals using spectral analyzers using time integration principle. The method means substitution of carrier frequency signal modulation with linear frequency modulated service signals by the modulation with mother wavelets. The output signal from the multielement photodetector represents wavelet transform of the recorded bioelectric signal. It has been found that the most perspective configurations of acousto-optic wavelet processors based on the mentioned principle are acousto-optic spectrum analyzers with combined time-and-space integration and acousto-optic processor of indefiniteness function formation. The basic advantage of the proposed method is the possibility to obtain the output processed signal in real time mode simultaneously with bioelectric signal recording.