MATLAB: Fir2 alternatives matlab

digital signal processingDSP System ToolboxMATLABsignalSignal Processing Toolbox

Right now I am using Fir2 function to generate fir filter that has the same gain and phase response as the given frequency response.

Fir2 function uses frequency sampling method to generate the filter coefficients. It samples the desired frequency response on a linear scale and estimates the coefficients using ifft. I am using logarithmic scales (audio processing), and fir2 is not giving me good response.

Is their anyway to convert the fir2 algorithm to sample on a log scale? Or are their any alternative algorithms in MATLAB?

Thanks 🙂

Best Answer

https://in.mathworks.com/help/signal/ref/fir1.html

Related Solutions

MATLAB: Magnitude of a filter

Hi Lisa, Filtering a signal usually implies convolving the signal with the impulse response of a linear time-invariant system.

In the frequency domain this is equivalent to mulitplying the frequency response of the signal with the frequency response of the filter.

Accordingly, it is desirable to have the magnitude of the filter as close to 1 as possible in the passband, so that in the passband, the frequency content of the signal is not modified in magnitude, just in phase.

MATLAB: Simple Frequency Response Function

I think I figured it out. Any comments/suggestions would be appreciated.

function H = FreqResponse(b,w)
%  This function inputs a vector b of filter coefficients and a vector w of
%  angular frequencies and outputs a complex-valued frequency response H.
H = zeros(length(b),1);
for k = 1:length(b) %index for filter coeff's
H = H + b(k) * exp(-1j*w*k);    %given frequency response
end
end

Best Answer

Related Solutions

MATLAB: Magnitude of a filter

MATLAB: Simple Frequency Response Function

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