| 陈建军.基于FPGA的多通道CIC滤波器设计[J].声学技术,2012,(6):624~627 |
| 基于FPGA的多通道CIC滤波器设计 |
| The design of multi-channel CIC filter based on FPGA technology |
| 投稿时间：2012-05-08 修订日期：2012-09-10 |
| DOI：10.3969/j.issn1000-3630.2012.06.019 |
| 中文关键词: FPGA 梳状滤波器 多级级联 内插二阶多项式 |
| 英文关键词: CIC (Cascaded-Integrator-Comb) filter Multi-level cascade Interpolated Second-Order Polynomial |
| 基金项目: |
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| 中文摘要: |
| 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. |
| 英文摘要: |
| 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 cascade 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. |
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