Research On The High Performance Acquisition System Of Underwater Acoustic Signal Based On DSP

The design and implementation of underwater acoustic signal acquisition system is reserached in the dissertation. A new signal regulating circuit is raised and accomplished. Design requirements which include small size and powerful functions are met.The system researched in the dissertation has the compact architecture built with DSP (Digital Signal Processor) and CPLD (Complex Programmable Logic Device), and includes the signal regulating module and the signal acquisition module. The embedded processor TMS320VC5416 of TI Inc. controls the whole system, which functions data processing furthermore. Many control function including the ADC (Analog-to-Digital Converter) acquisition, the timing logic control concerning to writing FIFO (First In First Out), and etc. are implemented by the CPLD of ALTERA Inc., which as an important periphery device. The enlargement and the filter to the underwater acoustic signal are achieved by the analog signal regulating circuit, which can provides the high signal-to-noise ratio analog signal to ADC.The underwater acoustic signal acquisition system includes the design and implementation of both hardware and software platform. Furthermore, the low system noise and the anti-electromagnetic interference design are also achieved during the design and implementation of the hardware platform. The codes of DSP and CPLD are programmed, complied and debugged during the software implementation.The underwater acoustic signal acquisition system provides a useful and credible platform of the underwater acoustic data acquisition experimentation.