METHOD FOR PROCESSING SIGNALS WITH HYPERBOLIC FREQUENCY MODULATION Russian patent published in 2020 - IPC G01S15/34 

FIELD: hydroacoustics.

SUBSTANCE: method of processing signals with hyperbolic frequency modulation relates to hydroacoustics and can be used in hydrolocation systems when a target is detected and its coordinates and motion parameters are determined. In the disclosed method of processing signals with hyperbolic frequency modulation, a reference signal is generated taking into account the effect of the propagation channel, for which the correlation function of the reflected signal with the reference signal is calculated without taking into account the effect of the channel and its square modulus, after determination of delay, it is compensated in signal reflected from target. During subsequent reception, a correlation function is calculated between the new reference signal and the received signal in the form of a product of their spectra and an inverse fast Fourier transform.

EFFECT: as a result of using the developed signal processing method, a new reference signal with hyperbolic frequency modulation is obtained, which takes into account the effect of the propagation channel, the use of which increases the signal-to-noise ratio at the input of the receiving channel of the sonar system by about three times.

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