Search results for: En-fang Sang
article
Journal of Marine Science and Application > 2008 > 7 > 3 > 168-173
A multi-beam chirp sonar based on IP connections and DSP processing nodes was proposed and designed to provide an expandable system with high-speed processing and mass-storage of real-time signals for multi-beam profiling sonar. The system was designed for seabed petroleum pipeline detection and orientation, and can receive echo signals and process the data in real time, refreshing the display 10...
chapter
The residue of the bidimensional empirical mode decomposition (BEMD) is the digital image low frequency trend. A method special for the compression of this large scale bi-dimensional signal has been introduced in this paper. Several concepts was introduced, such as the first IMF, the first residue and the grid characteristic points. Represented by the grid characteristic points, several local mean...
article
Journal of Marine Science and Application > 2006 > 5 > 4 > 54-57
A frequency invariant response algorithm is proposed for getting over the signal distortion in high frequency when the beamformer receives the broadband signals. In this method, the weight vector of the reference beam pattern is designed firstly, then the weight vectors when the beam response in the frequency sub-bands approaching the reference response mostly are computed by optimized method or adaptive...
chapter
2005 International Conference on Machine Learning and Cybernetics > 8 > 4908 - 4912 Vol. 8
The newly developed Hilbert-Huang transform (HHT) is introduced briefly in this paper. The HHT method is specially developed for analyzing nonlinear and non-stationary data. The method consists of two parts: (1) the empirical mode decomposition (EMD), and (2) the Hilbert spectral analysis. The EMD, which is the first part of the theory, can decompose any complicated data set into a finite and often...
