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In multibeam bathymetric systems, the presence of noise greatly reduces the reliability of phase difference estimation, and effective filtering is an urgent need. Aiming at the feature that the impact of noise varies over the measuring swath, the paper proposes a design of variable bandwidth filter. Compared with the fixed bandwidth filter commonly used, the variable bandwidth filter can increase...
Multi-beam bathymetry sonar is one of the current important equipments for seafloor bathymetry information detection. This paper extends the phase center cross-correlation method (PCCCT) which is successfully used in a 3- row bathymetric sidescan sonar to multi-beam bathymetry sonar, and a 3-subarray Direction-of-Arrival (DOA) estimation method based on phase difference measurement is proposed. A...
The phase difference principle is widely used nowadays to sonar systems used for sea floor bathymetry. The main drawback of this method is that the phase difference is measured with the problem of ambiguity. Hence, a given echo record versus time may be affected by several phase jumps. Here we deal with a new processing to remove this ambiguity which base upon multisource fusion. Unlike traditional...
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