基于FPGA的声呐信号数字预处理机的设计

摘要

In this paper ,a digital sonar signal preprocessor based on FPGA is designed .The system completes the task of synchronous sampling of 30-channel signal from the sensors ,quadrature demodulation FIR filtering and beamforming can be done in order to reduce the calculation pressure of upper monitor .This sonar signal sampling and preprocessing system balance the speed of sonar signal sampling and processing .%介绍了一种基于单片FPGA的声呐信号数字预处理机设计方案。系统可以对30路换能器输出的模拟信号进行同步采样，采样数据在FPGA中依次进行正交解调、FIR滤波、波束形成等声呐信号预处理计算，减轻了上位机计算任务，解决了多阵元声呐设备中数据采集速度和数据处理速度难以匹配的瓶颈。