The Technology Of DSP Applied To Signal Processing Of Acoustic Vector Sensor

It is more and more imminently pressive for the speed of data processing in underwater acoustic digital signal processing. Now Real-time digital signal processing has been an important part of sonar system. In the recent years, along with the development of the production technology of the vector hydrophone, more and more people notice the importance of the detect and measure technology of underwater acoustic vector signal, and it is applied in more and more fields. So it is necessary to realize real-time digital signal processing of underwater acoustic vector signal.There are several ways of estimating direction of arrival in use of the vector hydrophone: acoustic intensity detection, beam revolving and vector equations. Acoustic intensity detection can efficiently estimate objective direction, and frequence partition, beam revolving and vector equations can differentiate multi-object. Vector equations is one of non-linearity equations, and we can solve it by inherit arithmetic or homotopy arithmetic.ADSP SHARC21060 is one of current digital signal processing boards based on super harvard architecture, and it' s architecture is designed to streamy parallel. The main content of this paper is to contact signal processing technology of the vector hydrophone with SHRAC21060, and to realize real-time digital signal processing of underwater acoustic vector signal.On the basis of comprehending basic architecture, bus, interface, memory of SHARC21060, and making reference to basic theory of estimating direction by the vector hydrophone, signal processing flow which uses SHARC is designed on this paper. According to signal processing capcity and the memory of SHARC21060 chip, six SHRAC chips are used in practically processing. Every chip takes on different task, and it basically realized streamy parallel processing.It introduces several laky experimentations and maritime experimentations of the vector hydrophone system on this paper. And it gives the results of Jilin Songhua laky experimentation and Qingdao maritime experimentation. The results of analysing data are consistent with theory. The whole system is designed rationally and runs safely and reliably.In a word, on this paper it contacts underwater acoustic vector signal processing with DSP technology ,through theory analyse software design experimentation research, and realizes real-time processing of vector signal. It can efficiently detect and track underwater object.