DEVICE FOR DETECTION OF NARROW-BAND NOISE HYDROACOUSTIC SIGNALS BASED ON CALCULATION OF INTEGRAL WAVELET-SPECTRUM Russian patent published in 2009 - IPC G01S3/80 

FIELD: physics, acoustics.

SUBSTANCE: invention is related to the field of hydroacoustics, namely to devices for detection of narrow-band noise hydroacoustic signals (with spectral density of power in the form of separate discrete components or their scales) at the background of additive noise. Invention is based on calculation of continuous wavelet transformation of input process on the basis of complex analytical wavelet, relative band of amplitude spectrum of which matches relative band of spectral density of detected signal power. Device comprises analog-digital converter (ADC) 1, recirculator 2, the first calculator of fast Fourier transform (FFT) 3, complex multipliers 4.1 - 4.M, scaling devices 5.1 - 5.M, device of complex conjugation 6, device of negative frequencies nulling 7, the second calculator FFT 8, permanent memory (PM) 9, calculators of reverse FFT 10.1 - 10.M, calculator of module square 11, averaging device 12, threshold device 13, control device 14.

EFFECT: improved noise immunity of narrow-band noise hydroacoustic signal detector.

8 dwg