Matlab对复数信号进行带通滤波

function Hd = filterKK %FILTERKK 返回离散时间滤波器对象。 % MATLAB Code % Generated by MATLAB(R) 9.11 and DSP System Toolbox 9.13. % Generated on: 28-Apr-2024 22:23:59 % Equiripple Bandpass filter designed using the FIRPM function. % All frequency values are in MHz. Fs = 40; % Sampling Frequency Fstop1 = 2; % First Stopband Frequency Fpass1 = 3; % First Passband Frequency Fpass2 = 9; % Second Passband Frequency Fstop2 = 10; % Second Stopband Frequency Dstop1 = 0.0031622776602; % First Stopband Attenuation Dpass = 0.057501127785; % Passband Ripple Dstop2 = 0.0031622776602; % Second Stopband Attenuation dens = 20; % Density Factor % Calculate the order from the parameters using FIRPMORD. [N, Fo, Ao, W] = firpmord([Fstop1 Fpass1 Fpass2 Fstop2]/(Fs/2), [0 1 ... 0], [Dstop1 Dpass Dstop2]); % Calculate the coefficients using the FIRPM function. b = firpm(N, Fo, Ao, W, {dens}); Hd = dfilt.dffir(b); % [EOF]