介绍超窄带FIR滤波器的设计，对设计窄带滤波器非常有帮助。-Abstract—The method of interpolated finite impulse response (IFIR) filter design is presented and applied to narrowband FIR filter design. Based on available literature, techniques for

用matlab实现IFIR滤波器，其中，有关滤波器的各种相关参数可以自行设定，便于分析比较各种参数下的滤波器效果-Implementation of IFIR with matlab. The parameters of filter can be verified by user. This code is helpful for analyzing the influence of different variables.