def __init__(self, bpass, bstop, ftype='butter'):
self.b, self.a = fd.iirdesign(bpass,
bstop,
1,
100,
ftype=ftype,
output='ba')
self.ic = st.lfiltic(self.b, self.a, (0.0, ))
def __init__(self, bpass, bstop, ftype='butter'):
import scipy.signal.filter_design as fd
import scipy.signal.signaltools as st
self.b, self.a = fd.iirdesign(bpass,
bstop,
1,
100,
ftype=ftype,
output='ba')
self.ic = st.lfiltic(self.b, self.a, (0.0, ))
def __init__(self, outputConfig, frequency_hz=0.):
'''
Initialize filter object.
Parameters
----------
outputConfig : object
Output configuration parameters object
frequency_hz : float
Intermediate frequency
'''
super(LowPassFilter, self).__init__(3., 40.)
self.bw_hz = 1e6
passBand_hz = frequency_hz + self.bw_hz
stopBand_hz = frequency_hz + self.bw_hz * 1.2
nyqFreq_s = 2. / outputConfig.SAMPLE_RATE_HZ # 1.0 /Nyquist frequency
wp = passBand_hz * nyqFreq_s
ws = stopBand_hz * nyqFreq_s
order, wn = cheb2ord(wp=wp,
ws=ws,
gpass=self.passBandAtt_dbhz,
gstop=self.stopBandAtt_dbhz,
analog=False)
self.order = order
self.wn = wn
b, a = cheby2(
order + 1, # Order of the filter
# Minimum attenuation required in the stop band in dB
self.stopBandAtt_dbhz,
wn,
btype="lowpass",
analog=False,
output='ba')
self.a = a
self.b = b
self.zi = lfiltic(self.b, self.a, [])
def __init__(self, outputConfig, frequency_hz, bw_hz=1e6):
'''
Initialize filter object.
Parameters
----------
outputConfig : object
Output configuration parameters object
frequency_hz : float
Intermediate frequency in hertz
bw_hz : float, optional
Noise bandwidth in hertz
'''
super(BandPassFilter, self).__init__(3., 40.)
self.bw_hz = bw_hz
self.frequency_hz = frequency_hz
passBand_hz = bw_hz
stopBand_hz = bw_hz * 1.2
mult = 2. / outputConfig.SAMPLE_RATE_HZ
order, wn = cheb2ord(wp=[(frequency_hz - passBand_hz) * mult,
(frequency_hz + passBand_hz) * mult],
ws=[(frequency_hz - stopBand_hz) * mult,
(frequency_hz + stopBand_hz) * mult],
gpass=self.passBandAtt_dbhz,
gstop=self.stopBandAtt_dbhz,
analog=False)
b, a = cheby2(
order + 1, # Order of the filter
# Minimum attenuation required in the stop band in dB
self.stopBandAtt_dbhz,
wn,
btype="bandpass",
analog=False,
output='ba')
self.a = a
self.b = b
self.zi = lfiltic(self.b, self.a, [])
def __init__(self, outputConfig, frequency_hz, bw_hz=1e6):
'''
Initialize filter object.
Parameters
----------
outputConfig : object
Output configuration parameters object
frequency_hz : float
Intermediate frequency in hertz
bw_hz : float, optional
Noise bandwidth in hertz
'''
super(BandPassFilter, self).__init__(3., 40.)
self.bw_hz = bw_hz
self.frequency_hz = frequency_hz
passBand_hz = bw_hz
stopBand_hz = bw_hz * 1.2
mult = 2. / outputConfig.SAMPLE_RATE_HZ
order, wn = cheb2ord(wp=[(frequency_hz - passBand_hz) * mult,
(frequency_hz + passBand_hz) * mult],
ws=[(frequency_hz - stopBand_hz) * mult,
(frequency_hz + stopBand_hz) * mult],
gpass=self.passBandAtt_dbhz,
gstop=self.stopBandAtt_dbhz,
analog=False)
b, a = cheby2(order + 1, # Order of the filter
# Minimum attenuation required in the stop band in dB
self.stopBandAtt_dbhz,
wn,
btype="bandpass",
analog=False,
output='ba')
self.a = a
self.b = b
self.zi = lfiltic(self.b, self.a, [])
def __init__(self, outputConfig, frequency_hz=0.0):
"""
Initialize filter object.
Parameters
----------
outputConfig : object
Output configuration parameters object
frequency_hz : float
Intermediate frequency
"""
super(LowPassFilter, self).__init__(3.0, 40.0)
self.bw_hz = 1e6
passBand_hz = frequency_hz + self.bw_hz
stopBand_hz = frequency_hz + self.bw_hz * 1.2
nyqFreq_s = 2.0 / outputConfig.SAMPLE_RATE_HZ # 1.0 /Nyquist frequency
wp = passBand_hz * nyqFreq_s
ws = stopBand_hz * nyqFreq_s
order, wn = cheb2ord(wp=wp, ws=ws, gpass=self.passBandAtt_dbhz, gstop=self.stopBandAtt_dbhz, analog=False)
self.order = order
self.wn = wn
b, a = cheby2(
order + 1, # Order of the filter
# Minimum attenuation required in the stop band in dB
self.stopBandAtt_dbhz,
wn,
btype="lowpass",
analog=False,
output="ba",
)
self.a = a
self.b = b
self.zi = lfiltic(self.b, self.a, [])
def __init__(self, bpass, bstop, ftype='butter'):
import scipy.signal.filter_design as fd
import scipy.signal.signaltools as st
self.b, self.a = fd.iirdesign(bpass, bstop, 1, 100, ftype=ftype, output='ba')
self.ic = st.lfiltic(self.b, self.a, (0.0,))
def __init__(self, bpass, bstop, ftype='butter'):
self.b, self.a = fd.iirdesign(
bpass, bstop, 1, 100, ftype=ftype, output='ba')
self.ic = st.lfiltic(self.b, self.a, (0.0,))
