The device of the adaptive filtering of the signals receipts by an active sonar for the rejection of the reverberation

摘要

Device of the adaptive filtering, of signals receipts by an active sonar for the rejection of the signals of the reverberation due to the marine environment. / p & & p & a device 41 for the formation of angular channels provides the signals of channel, such as b corresponding to the bearing angle of th. The values of the angular width dth has 3db of attenuation of the diagram of the track, the speed of the wearer, the frequency emise and the angle th are implemented in a calculation device for supplying the doppler frequencies of the wearer of the central frequency f and of the strip df. These values respectively supply the demodulation frequency f, each channel signal b is of the circuits modulators 421, 422 and the cut-off frequency f, is of the filters 441 and 442 filtering each component demodulated x, y of each channel signal b. / p & & p & a detection in a marine -