FIR内插滤波器结构与实现综述

在全数字接收机对多抽样率信号处理的需求下，滤波器的高效实现成为我们关注的重点。首先综述了FIR内插滤波器的三种常用结构，然后对半带滤波器、CIC(cascaded integrator-comb)滤波器的特殊结构进行了剖析，说明了各种类型内插滤波器的优缺点，给出了CIC滤波器设计参数和幅频响应的关系。最后对内插滤波器的一类特殊应用-分数倍内插滤波器进行分析，并提出了一种分数倍内插滤波器的高效实现结构。

A Survey of FIR Interpolation Filter Structure and Application

In the need of multirate signal processing of full digital receiver, the high efficient implement of filters become the emphasis of our attentions. A survey is given about three structures of FIR interpolation filter. Through analyzes the special structure of half band filter and CIC filter, it offers the advantages and disadvantages of various filters and provides the relationship between the parameters of CIC filter and the frequency response. In the end, during the introduction to a special application of interpolation, non-integer radio interpolation filter, an effective implementation structure is presented of fractional ratio interpolation filter.