基于多相分解和曲线拟合的改进CIC抽取器  

Improved CIC Decimator Based on Polyphase Decomposition and Curve Regression

作　　者：刘宇[1] 王静[1] 王伟伟[1] 赵伟[1] 

机构地区：[1]大连海事大学信息工程学院,大连116026

出　　处：《数据采集与处理》2007年第2期245-248,共4页Journal of Data Acquisition and Processing

摘　　要：传统的CIC(Cascaded integrator comb)抽取器设计往往不能同时满足改善频响特性、降低采样率和降低功耗的要求,需采取折中的办法。本文提出了一种改进的CIC抽取器结构,用多项分解的方法降低了抽取滤波器工作的采样率,同时降低了功耗;再用曲线拟合技术改进频响特性,这种抽取器在降低采样率、减少硬件资源和改善频响特性3个方面同时得到满足,数值仿真验证了这一结论。The conventional CIC decimator cannot satisfy the requirements on the magtitude response, the power consumption and sample rate at the same time. This paper proposes a modified CIC decimator architecture. It can decrease the sample rate and the power by polyphase decomposition method; and modify frequency response characteristics by using curve regression technology. The three requiements can be satisfied by the improved decimator. The numerical simulation proves the results.

关 键 词：多相分解 曲线拟合 级联积分梳状滤波器 抽取器 

分 类 号：TN911.25[电子电信—通信与信息系统]