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Analyzed the tunnel effect and its mechanism of appearance in multi-beam bathymetry sonar and pointed out that the side lobe interference was an important factor which caused the tunnel effect, and the existence of tunnel effect would lead to the multi-beam bathymetry sonar mistake relatively flat seafloor for concave-up horizontal half cylinder terrain. Studied on all phase FFT (apFFT) algorithm...
The appearance of artificial false data would affect the detection accuracy in multi-beam bathymetry sonar and then lead to distortion of seafloor structure. The tunnel effect caused by side lobe interference has an important effect on the bathymetric results and it would mistake relatively flat seafloor for concave-up half cylinder characteristic. The tunnel effect is prominent when the seafloor...
In this paper, a near-field high resolution direction and range estimation approach is proposed, which combines common near-field dynamic focusing beamformer with high-order cumulant based TLS-ESPRIT like high resolution algorithm to estimate the direction and range information of near-field sources. Under the condition of unknown source number, the distribution of eigen values around unit circle...
This paper presents a Shallow water High Resolution Multi-Beam Echo Sounder (SHMBES), which will be used widely in modern ocean exploration and underwater engineering. It is highly synthesized and developed on the basis of many new techniques such as theories of underwater acoustic and modern signal processing, Very Large Scale Integration (VLSI), DSP array processing, etc. It is mainly composed of...
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