cupyx.scipy.signal.lp2hp#
- cupyx.scipy.signal.lp2hp(b, a, wo=1.0)[source]#
Transform a lowpass filter prototype to a highpass filter.
Return an analog high-pass filter with cutoff frequency wo from an analog low-pass filter prototype with unity cutoff frequency, in transfer function (‘ba’) representation.
- Parameters:
b (array_like) – Numerator polynomial coefficients.
a (array_like) – Denominator polynomial coefficients.
wo (float) – Desired cutoff, as angular frequency (e.g., rad/s). Defaults to no change.
- Returns:
b (array_like) – Numerator polynomial coefficients of the transformed high-pass filter.
a (array_like) – Denominator polynomial coefficients of the transformed high-pass filter.
Notes
This is derived from the s-plane substitution
\[s \rightarrow \frac{\omega_0}{s}\]This maintains symmetry of the lowpass and highpass responses on a logarithmic scale.