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,))