METHOD OF DETECTING AND CLASSIFYING SIGNAL FROM TARGET Russian patent published in 2013 - IPC G01S15/04 

FIELD: physics.

SUBSTANCE: signal is received by a static fan a beam pattern. Input information received by all beam patterns is discretised. All received readings are stored. Information in the beam patterns is processed successively as input information comes in. A threshold is calculated on the average value of all readings measured in the first reception cycle on all beam patterns. The overshooting of the selected threshold is automatically detected successively on all beam patterns of the of the static fan. The amplitude and number of the reading exceeding the threshold are measured and stored. The number of the beam pattern in which the threshold was exceeded is measured and stored. The maximum amplitude is measured. The successive operations are repeated for the next 3 or more transmissions. The measured maxima are identified on beam patterns and on transmissions. Radial velocity of the object to be classified is measured. Dispersion of the maximum amplitude of the echo signal from the object is calculated for 3 or more transmissions. The object is a surface object if the value of the dispersion of the maximum amplitude is higher than the threshold. The target is an underwater target if there are more than 3 transmissions, the radial velocity of the object to be classified is constant and if conditions are not satisfied.

EFFECT: possibility of automatic classification of echo signals from surface and underwater objects.

2 cl, 1 dwg