To meet the need of research of some sonar system , the paper designs an embedded and digital sonar signal simulator , which can conveniently provide multi - parameter and multi - channel sonar signal in the digital format for the debug of sonar system in real time
12.
For those biological signals like echo of bat or whale , as well as man - made system signals like radar or sonar signal , the instantaneous frequency of signal component contains important information and could be used for signal model parameters extraction . so that the proper choose of transformed domain and signal characteristic extraction method is of crucial important . the ridge extraction method used for signal characterization was first proposed in the 1990s , it ' s based on the study of the phase of the wavelet ( or other linear ) transform
13.
In the early years , beam former is mainly designed in narrow band , and applied in radar , communication etc . however , in signal processing , many broadband signals will be processed , for instance : earthquake signal , sound signal or sonar signal
14.
Firstly , introduce the design of sonar display , trace - to - trace correlation and gray scale display , develop a new method of gray scale based on signal noise ratio . and next , discuss array signal processing and image processing in order to improve the display . finally , develop a software of sonar display simulator based on object oriented programming , with which the sonar display console is simulated and the performance of sonar signal is tested
15.
This thesis discusses on the post - processing of sonar signal which includes the search and location of the target , the pattern recognition and the neural networks classification , and also carries out a process of the sea test data with the post - process - programs to verify the validity of the pattern recognition with bp neural network , which helps to develop the sonar image processing and the image processing of other fields
16.
On the basis of summarization of the simulating technology of sonar signal , the paper brings forward the mathematics models of radiate noises of ships and torpedo , and simulates in computer ; tests the correctness of some pivotal methods through the simulation , on the basis of which , system scheme being brought out ; a parallel processor with twelve sharcs , combining with parallel processing theory and topographic configuration , is used to realize the algorithm of noise simulation on the basis of research on optimum distribution of algorithm and method of embedment in real time ; at last , gui , realized with vc + + language , is used to set parameters and control the whole parallel system flexibly and conveniently
17.
Second discusses adaptive filter ' s application in measuring frequency of cw sonar pulse signal and in towed linear array sonar signal processing . simulation is made about adaptive filter ' s application . simulation result shows that adaptive filter is very powerful tool for underwater acoustic signal processing
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