以ⅡR滤波器作补偿的CIC滤波器设计  

Design of cascaded integrator comb filter using ⅡR filter compensation method

作　　者：徐向斌[1] 栾晓明[1] 张茂磊[1] 王朝[2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001 [2]哈尔滨工程大学水声工程学院,哈尔滨150001

出　　处：《信息技术》2011年第9期71-75,共5页Information Technology

摘　　要：为解决积分梳状(CIC)滤波器通带失真大和阻带衰减小对其应用的限制,在分析传统CIC滤波器幅频特性的基础上,给出一种用二阶ⅡR滤波器作为补偿滤波器级联CIC滤波器的改进方法。仿真结果表明,它与同级数规模的内插二阶多项式CIC滤波器、锐化CIC滤波器(SCIC)相比,通带和阻带的性能得到较大改善,实现复杂度较低。因此,它适用于对通带、阻带性能和实现复杂度要求较高的多采样率转换系统。The high passband distortion and low stopband attenuation limit the application of cascaded integrator comb（CIC）.In order to solve these problems,a new method,which is based on the characteristics of conventional CIC filter,is proposed.This new method employs high efficient secondorder ⅡR filter as a compensating filter cascading a conventional CIC.The experiments show that performances both in passband and stopband are improved when it is compared to interpolated secondorder polynomials CIC（ISOP-CIC） and sharpening CIC（SCIC）,also it is of low complexity.Thus,this design is well suited for speed-limited systems with sample rate conversion while require high performance of passband and stopband.

关 键 词：采样率变换 积分梳状滤波器 二阶ⅡR补偿滤波器 

分 类 号：TN713[电子电信—电路与系统]