数字多普勒系统中的窄带滤波器的设计方法  

Designing Method of Narrow Band Filter in Digital Doppler System

作　　者：郝秋赟[1] 卢荣军[2] 

机构地区：[1]东南大学信息科学与工程学院,南京210096 [2]东南大学AMS研究中心,南京210096

出　　处：《中国新通信》2008年第13期60-63,共4页China New Telecommunications

基　　金：深空探测数字多普勒数据采集系统

摘　　要：随着软件无线电技术的发展,使信号的采样频率越来越高,而在高采样率的条件下,进行窄带FIR滤波器的设计是非常困难的。本文采用多抽样率结构来设计窄带FIR滤波器,使窄带FIR滤波器易于实现。另外利用多级结构并使用特殊滤波器可以有效地实现窄带FIR滤波器,通过多个滤波器的级联,放宽了对每个滤波器的要求,从而使滤波器的总的乘法系数个数减少,乘法运算率减小,同时又不增加滤波器结构的复杂。With the rapid development of software radio technology, the sampling rate is becoming high. On the condition of high sampling rate, the designing of narrow band FIR digital filters is very difficulty. Based on muhirate digital signal processing, this paper uses an effective method to design narrow band FIR digital filter, which makes the designing of narrow band FIR digital filters easy to implement. Furthermore, narrow band filter can effectively implemented by using multiple stage structures and special filters. The requirements of every filter have been relaxed. Thus the designing method of narrow band filter reduces the total number of multiplication, the rate of multiplication operation and it does not increase complexity of filter＇s structures.

关 键 词：抽取 内插 CIC滤波器 半带滤波器 

分 类 号：TN713[电子电信—电路与系统] TN959.4