| 摘要 |
FIELD: physics. ^ SUBSTANCE: echo signal is received through a multichannel receiving path whose spatial receiving channels form a fan of static beam patterns which cross at a level of at least 0.7 of the maximum; selection of temporary realisations for processing is carried out successively in each receiving channel; determination of the overshooting by the echo signal of the level of the selected threshold is carried out in each receiving channel; neighbouring receiving channels in which the threshold has been exceeded are selected; time intervals for arrival of the echo signal is determined in these channels and if the time intervals match, the correlation function between the temporary sets of selected neighbouring receiving channels is measured, and the decision on presence of a local reflector is made if the coefficient of correlation between the temporary sets of neighbouring receiving channels, having the same time of arrival of the echo signal, is greater than 0.5, otherwise a decision is made on presence of distributed interference or a non-local reflector. The number of receiving channels must not be greater than 4. ^ EFFECT: detection of a local object in conditions where there is distributed interference. ^ 2 cl, 1 dwg |
