| 摘要 |
FIELD: technical hydro-acoustics. ^ SUBSTANCE: method includes receipt of acoustic oscillations in N points, located at distance d from each other at length of straight line L=d(N-1) long, transformation of acoustic oscillations to electric oscillations, electric compensation of oscillations along axis of directivity characteristic in direction counted from center of length of line of angle alpha0, introduction of time delays between electric oscillations, transformation of electric oscillations, received in each pair of points 1 and i, (i=), at distances d(i-1) from each other, into mutual energy spectrums G1,i(fn), selection of N-1 active components of mutual energy spectrums S1,i(fn) in n frequency points with given resolution Deltaf and their energy addition at each one of frequencies fn. Before transformation of electric oscillations, received in each pair of points 1 and (i=) to mutual energy spectrums, filtration of these electric oscillations is performed in bands Deltaf at each one of average frequencies of spectral analysis f1, f2,...,fn with selection of these bands from inequality C/3lambdaW(N-1) >= Deltaf >= 1/, where C - sound speed in water, lambdaW - wave length at upper frequency of working range of frequencies, N - number of receipt points, epsilonfl fluctuation component during signal receipt, - given time of averaging across the group of spectrum realizations during performing of mutual-spectral analysis in real time scale. ^ EFFECT: increased spatial selectivity of receipt in f bands of broadband random signals with usage of all receipt points without loss of information due to optimization of resolution of mutual energy and spectral analysis. ^ 1 dwg |
