What is chosen directly? Stopband attenuation? And actually I wanted to design this filter using matlab.. N there in order to calculate the order of filter...all 4 mentioned parameters were asked.
[Moved]How do I design a Butterworth bandpass filter for PPG signal.
I want to design a Butterworth bandpass filter using MATLAB for Photolysthemograph signal. I know the bandpass freq that is .5-6 hz.. Can I design the filter using just passband freq (if yes, please tell me the steps) or do I need some other parameters as well.?
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Is there a specific way of choosing order of the filter or is it chosen randomly...n thanks for the help.