Method and device for detecting one or more fixed pulses or pulse trains in a receiving or group signal and active sonar assembly

摘要

The method involves determining a spectrograph from a group of reception signals and a reference pattern from the predetermined pulse (80) or a predetermined pulse sequence (82). The reference pattern is searched by pattern recognition in the spectrograph or an image derived from the spectrograph to detect the predetermined pulse or predetermined pulse sequence in the group of reception signals of the spectrograph or the image derived from the spectrograph when the reference pattern detects the image derived in the spectrograph. Independent claims are also included for the following: (1) a device for detecting predetermined pulses or predetermined pulse sequences in reception signal determined from received sound waves (2) an active sonar system.