Filter Design (gwpy.signal.filter_design)

Analogue and digital filter design utilities.

This module is mainly a wrapper around scipy.signal filter design, with convenience functions for common filter types, and support for LIGO-specific filter design conventions.

Functions

bandpass(-> ZpkType  -> BAType  -> SosType)	Design a band-pass filter for the given cutoff frequencies.
concatenate_zpks(*zpks)	Concatenate a list of zero-pole-gain (ZPK) filters.
fir_from_transfer(transfer, ntaps[, window, ...])	Design a Type II FIR filter given an arbitrary transfer function.
frequency_response(filt, frequencies, *[, ...])	Compute the frequency response of a filter at given frequencies.
highpass(-> ZpkType  -> BAType  -> SosType)	Design a high-pass filter for the given cutoff frequency.
is_sos(sos)	Return True if sos looks like a SOS-format filter definition.
is_zpk(zpktup)	Return True if zpktup looks like a ZPK-format filter definition.
lowpass(-> ZpkType  -> BAType  -> SosType)	Design a low-pass filter for the given cutoff frequency.
notch(-> ZpkType  -> BAType)	Design a ZPK notch filter for the given frequency and sampling rate.
parse_filter(-> tuple[Literal[], ...)	Parse arbitrary input args into a TF, ZPK, or SOS filter definition.
prepare_analog_filter(filt, *[, unit, ...])	Prepare an analog filter by parsing and converting units.
prepare_digital_filter(-> BAType  -> ZpkType)	Prepare a filter for digital filtering.