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Function iir_highpass¶

`function` iir_highpass(const zpk &, double, double) dsp ¶

zpk iir_highpass(const zpk& filter, double frequency, double fs = 2.0)

Designs a digital highpass IIR filter and returns ZPK coefficients.

Applies frequency pre-warping, lowpass-to-highpass analog transformation, and bilinear transform to convert an analog lowpass prototype to a digital highpass filter.

Parameters
filter	Analog lowpass prototype (butterworth, chebyshev1, chebyshev2, bessel, or elliptic).
frequency	Cutoff frequency in Hz. If fs is omitted (left at its default of 2.0), frequency is interpreted as normalized to Nyquist, so the valid range is 0..1.
fs	Sampling frequency in Hz (default 2.0, i.e. Nyquist = 1 Hz).

Returns
	Digital highpass filter in ZPK form.

Fully qualified name: kfr::iir_highpass(const zpk &, double, double)

Declared at dsp/iir_design.hpp:276

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