改进型CIC抽取滤波器的研究与设计  

Research and design on the improved CIC decimation filter

作　　者：张茂磊[1] 栾晓明[1] 徐向斌[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2011年第2期18-21,共4页Applied Science and Technology

摘　　要：由于CIC(级联积分梳状)滤波器不需要乘法运算和存储系数,因此实现非常简单,在采样率变换过程中经常使用CIC滤波器进行数字滤波.在CIC滤波器概念的基础上,提出了基于正弦函数的补偿滤波器与基于锐化技术的改进型CIC滤波器,补偿滤波器与锐化技术二者用来改善CIC滤波器的通带与阻带特性.通过对CIC滤波器及其改进型的综合性能进行对比体现出所设计滤波器的优点.CIC（cascaded integrator comb） filter is often used in the process of the sampling rate conversion for finishing the digital filter due to its simplicity which requires no multiplication or coefficient storage.Based on the introduction to the concept of CIC filter,a compensation filter which was based on the sine function and an improved CIC filter which was based on the sharpening technique were proposed in this paper.Both of compensation filter and sharpening technique can be used for improving the characteristics of passband and stopband of the CIC filter.By comparing the comprehensive performance,the designed filter has some advantages over the CIC filter and its improved one.

关 键 词：采样率变换 CIC抽取滤波器 补偿滤波器 锐化技术 

分 类 号：TN911.23[电子电信—通信与信息系统]