Research on underwater broad-band signal prediction
水声宽带信号波形预报技术研究

Because taking signal characteristic for detection about long-distance underwater weak signal, research for acoustic signal and ocean channel transfer characteristic were matched closely. Research on underwater broad-band signal prediction techniques was one of the important breakthrough in the study of refinement characteristics of underwater signal. The paper aims at broadband signal, making use of beam displacement ray mode(BDRM) frequency domain synthetic waveform algorithm and BELLHOP ray time domain waveform algorithm building broadband signal long-distance waveform prediction model. Under typical ocean environment including shallow water with a thermocline and deep sound channel, it took advantage of two kinds of broadband waveform predict algorithm mentioned above, simulating long-distance broadband signal waveform and comparing algorithm predict precision. It pointed out that on certain conditions, the two models have the same calculation accuracy, and can meet the needs of a signal waveform forecast under different conditions.