Generation method and apparatus for generating a numeric column design apparatus and method for designing a digital filter, digital filter design program, digital filter, the desired frequency response, numeric column generation program for the desired frequency characteristics

摘要

By computing the interpolation function of finite future by entering the standard functions, the desired amount to shift the frequency axis frequency characteristic of the interpolation function, and determine the input frequency characteristic based on the specification. Then, by the filter coefficient by which the inverse FFT numeric string representing the input frequency characteristic, and to obtain the filter coefficients of the smaller number by rounding based on the coefficient values, and operations to reduce the number of filter coefficients The eliminates the need for windowing as to be able to simply design an FIR filter having desired frequency characteristics.