- cupyx.scipy.signal.iirpeak(w0, Q, fs=2.0)#
Design second-order IIR peak (resonant) digital filter.
A peak filter is a band-pass filter with a narrow bandwidth (high quality factor). It rejects components outside a narrow frequency band.
w0 (float) – Frequency to be retained in a signal. If fs is specified, this is in the same units as fs. By default, it is a normalized scalar that must satisfy
0 < w0 < 1, with
w0 = 1corresponding to half of the sampling frequency.
Q (float) – Quality factor. Dimensionless parameter that characterizes peak filter -3 dB bandwidth
bwrelative to its center frequency,
Q = w0/bw.
fs (float, optional) – The sampling frequency of the digital system.
b, a – Numerator (
b) and denominator (
a) polynomials of the IIR filter.
- Return type
- Sophocles J. Orfanidis, “Introduction To Signal Processing”,