（MATLAB）fvtool（FilterObject）和fvtool（FilterObject.SOSMatrix）之间的差异
我正在设计一个数字滤波器来放大低频，我使用IIR的任意大小。代码如下所示：（MATLAB）fvtool（FilterObject）和fvtool（FilterObject.SOSMatrix）之间的差异,matlab,filtering,Matlab,Filtering,我正在设计一个数字滤波器来放大低频，我使用IIR的任意大小。代码如下所示： % Acquisition Frequency FreqAq = 1024; % Low Frequency Gain LFGain = 10^(14.4/20); % Frequency Intervals FreqIntv = [2 6 600]/FreqAq; % Numerator Order NumOrder = 40; % Denominator Order DenOrder = 45; % Fre
% Acquisition Frequency
FreqAq = 1024;
% Low Frequency Gain
LFGain = 10^(14.4/20);
% Frequency Intervals
FreqIntv = [2 6 600]/FreqAq;
% Numerator Order
NumOrder = 40;
% Denominator Order
DenOrder = 45;
% Frequency Spectrum
Freq = linspace(0,FreqAq,FreqAq + 1)/FreqAq;
% Amplitude Design
bLF = log(1/LFGain)/(FreqIntv(1) - FreqIntv(2));
aLF = LFGain*exp(bLF*FreqIntv(1));
A = [LFGain*ones(1,find(Freq == FreqIntv(1))),...
aLF*exp(-bLF*Freq(find(Freq == FreqIntv(1)) + 1:find(Freq == FreqIntv(2)))),...
ones(1,find(Freq == FreqIntv(3)) - find(Freq == FreqIntv(2))),...
ones(1,length(Freq) - find(Freq == FreqIntv(3)))];
% Arbitrary response magnitude filter specification object
d = fdesign.arbmag('Nb,Na,F,A',NumOrder,DenOrder,Freq,A);
% Filter Weights
W = [ones(1,find(Freq == FreqIntv(1)))*1 ...
ones(1,length(Freq(find(Freq == FreqIntv(1)) + 1:find(Freq == FreqIntv(2)))))*.1 ...
ones(1,find(Freq == 10/FreqAq,1,'first') - find(Freq == FreqIntv(2)))*1 ones(1,find(Freq == FreqIntv(3)) - find(Freq == 10/FreqAq,1,'first'))...
ones(1,length(Freq) - find(Freq == FreqIntv(3)))*1];
% Filter Design
Hd = design(d, 'iirlpnorm', 'Weights', W, 'Norm', 2, 'DensityFactor',30,...
'SystemObject',true);
DataFiltered = sosfilt(Hd.SOSMatrix,Data)
fvtool(Hd, 'MagnitudeDisplay','Magnitude (dB)', ...
'NormalizedFrequency','On','Color','White');
fvtool(Hd.SOSMatrix, 'MagnitudeDisplay','Magnitude (dB)', ...
'NormalizedFrequency','On','Color','White');