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Home » Developing U++ » Bazaar » Bazaar/STEM4U: Added Butterworth filter
Bazaar/STEM4U: Added Butterworth filter [message #55810] Thu, 17 December 2020 08:13 Go to next message
koldo is currently offline  koldo
Messages: 3249
Registered: August 2008
Senior Veteran
The Butterworth IIR filter is a type of signal processing filter designed to have a frequency response as flat as possible in the passband. It is also referred to as a maximally flat magnitude filter. It was first described in 1930 by the British engineer and physicist Stephen Butterworth in his paper entitled "On the Theory of Filter Amplifiers"

These filter functions are templated and can be used with different vector types like U++ Vector<>, Eigen VectorXd and std::vector<>.

Its behaviour is equivalent to Matlab functions filter(), filtfilt() and butter().

Reference is here.


Best regards
Iñaki
Re: Bazaar/STEM4U: Added Butterworth filter [message #55868 is a reply to message #55810] Thu, 24 December 2020 13:47 Go to previous message
koldo is currently offline  koldo
Messages: 3249
Registered: August 2008
Senior Veteran
Added ButterLowPass(), ButterHighPass() and ButterBandStop(), similar to Matlab butter() functions.

Best regards
Iñaki
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