test.rem

来自「我自己改写的Remez,FIR滤波器参数计算程序」· REM 代码 · 共 16 行

// Lowpass filter example
// Note: type defaults to bandpass & weights default to 1
// This file describes a lowpass filter with a desired amplitude
// of 1 in the frequency range [0, 0.45] and zero in the range
// [0.55, 1]. The range [0.45, 0.55] is a transition region.

// For an 8 KHz sampling rate the Nyquist frequency is 4 Khz and
// the passband will be 0 to 1800 Hertz and the stopband will be
// 2200 to 4000 Hertz.

type = bandpass
weights = 1, 1
order = 22
bands = (0, 0.45), (0.55, 1)
amplitudes = 1, 0