Active sonar systems in the presence of strong direct blast

Active sonar system performance in the presence of strong direct blast, or reverberations from the projected waveform, is considered. The presence of these reverberations may severely limit target detection performance and the applicability of the continuous active sonar (CAS) paradigm. Signal processing approaches to detect objects of interest and estimate relevant target parameters are described for signals subjected to these powerful reverberations. Results obtained by processing data from the TREX'13 experiment are presented and discussed.