In order to provide experimental verification platform for passive acoustic detection technology research

a system scheme for real-time data acquisition and processing is designed. The system is based on digital signal processor（ DSP） and field programmable gate array（ FPGA）. FPGA controls the anolog digital converter（ ADC） collecting data and transferring data to PC through USB 2. 0 circuit for early off-line verification; FPGA transfers the collected data to DSP though external memory interface（ EMIF） for real-time processing. Experiment shows that the system realizes the real-time data acquisition

off-line data storage in the passive acoustic detection system. The data acquisition and data processing are carried out by different processors which can improve response speed and processing performance of the system and satisfy the real-time requirement of the system.