基于FPGA的FIR数字滤波器设计与仿真

摘要

In view of the application of the weak signal digital correlation detection system, designed FIR digital filter based on FPGA. Through analyze and compare the characteristics of different structure of FIR filter, and comprehensive considering the fac-tors such as processing speed and resource consumption, decided to adopt the optimized distributed algorithm to design digital filter. Finally, the functional simulation is carried out for the designed FIR low- pass digital filter. Simulation results show that the FIR low- pass digital filter can effectively filter out noise outside of the passband, and it is satisfied with application requirement of the weak signal digital correlation detection system.%针对微弱信号数字相关检测系统的应用问题，设计了基于 FPGA的 FIR 数字滤波器。通过对不同结构的 FIR滤波器的特性进行分析比较，结合运算处理速度和资源消耗等因素，确定采用优化的分布式算法来设计数字滤波器。最后对设计的 FIR低通数字滤波器进行了功能仿真，仿真结果显示：设计的 FIR 低通数字滤波器能够有效滤除带外噪声，能够满足数字信号相关检测系统的应用要求。