基于FPGA的多通道CIC滤波器设计  

The design of multi-channel CIC filter based on FPGA technology

作　　者：陈建军[1] 

机构地区：[1]中国人民解放军91439部队

出　　处：《声学技术》2012年第6期624-627,共4页Technical Acoustics

摘　　要：数字信号处理中运用CIC滤波器进行采样率转换非常普遍。考虑到实际应用,传统的CIC滤波器存在一些不足。采用多级级联方法降低了对硬件运算速度的要求,有利于实时处理;采用余弦滤波器改善了阻带衰减不足;内插二阶多项式滤波器补偿了CIC滤波器通带内的衰减;抗混叠低通滤波器减小了混叠影响。通过仿真实验验证了FPGA硬件平台的可行性。It is known that CIC filter has been commonly used for sampling rate transforming in digital signal processing,and that some defects of traditional CIC filter exist in practical applications.However,the multi-level cas-cade connection of CIC filters can decrease the requirement of hardware for real-time processing;the Cosine filter improves the deficit of stop-band attenuation;the Interpolated Second-Order Polynomial filter compensates the attenuation of CIC filter in pass-band and the Anti-alias Low Pass filter reduces the influence of aliasing.The feasibility of FPGA hardware platform is verified by simulation.

关 键 词：FPGA 梳状滤波器 多级级联 内插二阶多项式 

分 类 号：TB556[理学—物理]