Time-frequency analysis for underwater acoustic signals based on wideband beamformer outputs

For the problem that the detection of wideband target echo signals under low signal to reverberation plus noise ratio (SRNR) is very difficult, a scheme of time-frequency analysis detection for underwater acoustic signals based on wideband beamformer outputs is proposed in this paper, which combines time-domain wideband constant beamwidth beamforming (WCBB) together with time-frequency analysis. The computer simulation results under low SRNR show that, this scheme can improve the performance of time-frequency analysis detection for underwater acoustic signals.