HYDRO-ACOUSTIC TONE SIGNALS RESOLUTION METHOD Russian patent published in 2019 - IPC G01S15/00 

FIELD: hydro acoustics.

SUBSTANCE: invention relates to the field of hydro acoustics, and in particular to the sonar signals in the real propagation channel processing methods, and can be used in sonar communication, control and positioning systems, where the recorded signals compression and recovery algorithms are applied. Tonal sonar signals resolving method based on the received signal X_t(ƒ) spectrum by the standard probe pulse X₀(ƒ) spectrum dividing method and determining the reflected signal fixing moment from the inverse Fourier transform maximum over the spectra division result, according to the invention, with performance of the received signal filtering based on the channel impulse response, resulting from the channel response processing, which is determined by the probing pilot signal with infinite spectrum propagation and reception analyzing, as well as by the spectra division method complementing, which consists in the received signal spectrum dividing by the reference signal spectrum, hydro acoustic signal detecting threshold calculating algorithm H=-ln[1-(1-q)^2/(N-2)] based on the signal in noise detecting statistical criteria, and the subsequent adjustment performance by the spectral-correlation analysis, considering the recorded signal as the time series, based on the Fourier coefficients calculation and and based on them correlation functions R_k=A_k²+B_k², with use of the maximum correlation rule: if R_k>R_max, R_max>R_k in this adjustment window by the value of [-π;π], and the corrective phase calculation relative to zero at the detection time, with the correction phase value of , determined from the ratio

, determining the reflected component in the channel fixation true moment.

EFFECT: increase of noise immunity in solving the problem of the tonal sonar signal detection under conditions of multiple reflections.

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