Abstract:

A new method is proposed to extract the echo of targets from the receiving data with phase matching for the case of reverberation suppression and echo detection of active sonars. First, the sub-arrayed direct data domain beam-forming is constructed to obtain the output time sequences in signal orientation. Second, the echo of targets is calculated by using the relationship between signal phase and object orientation from output sequences. Then, some special functions are designed for detection in this scene. Unlike the traditional correlation techniques and space-time adaptive processing (STAP) methods, the proposed method does not need to know the statistical properties and correlation between signals and reverberation. By the analysis of experimental data, it is verified to be more efficient than the conventional process.