基于高通滤波器的 FIR 带通滤波器的设计与仿真

摘要

详细分析了高通滤波器与带通滤波器的冲击响应函数和幅频响应函数之间的关系，提出了一种新的带通滤波器的设计方法，利用带通滤波器的冲击响应（或幅频响应）等于两个不同截止频率的高通滤波器的冲击响应（或幅频响应）之差设计带通滤波器，并给出了仿真结果。与传统的设计方法相比，该方法设计简单、运算量少、灵活性强，为带通滤波器的设计提供了一种新思路。%The relationship between amplitude-frequency response function and the impulse response func-tion of high-pass filter and band-pass filter is detailedly analyzed in this paper .And a new design of band-pass filter is proposed ,that is to design by the theory of the impulse resopnse (or amplitude-frequency re-sponse) of band-pass filter is equal to the difference between the two different off-frequencies in high-pass filter .The simulation result is given .Compared with traditional method ,this method is simple ,flexible , with less calculating work ,and offers a new clue for the design of band-pass filter .