基于FPGA的可变接收频带信号处理机设计

摘要

Aimed at the extensive application of FPGA and DSP in the field of underwater signal detection, a Design scheme of variable receiving frequency band signal processor based on FPGA is presented. As the logic control center, FPGA realized the filtering of two-chan-nel A/D sampled analog signal and one-channel digital serial data signal through timing control. The coefficient of FIR filters and sampling frequency can be loaded dynamically through the communication between the DSP and FPGA. The signal receiving frequency band is selected flexibly through the dynamic loading of the coefficient. Then the board of system is debugged and tested, results showed that the system realized the related function of receiving variable frequency band and had the stable, real-time, flexibility and other advantages.%针对FPGA和DSP在水下信号检测领域的广泛应用,提出了一种基于FPGA的可变接收频带信号采处理机系统设计方案；系统以FPGA为主控制模块,通过时序控制,分别实现FIR滤波器对两通道A/D采样信号以及一通道数字串口信号的滤波,通过DSP与FPGA之间的通讯,实现了 FIR滤波器系数和采样频率的动态加载,灵活的改变接收信号频带,以应对复杂的环境变化;最后经过系统硬件的调试与测试,结果表明系统实现了可变接收频带的相关功能,并具有稳定性、实时性、灵活性等优点.