55 lines
1.4 KiB
Python
55 lines
1.4 KiB
Python
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from csdr.chain.demodulator import BaseDemodulatorChain
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from pycsdr.modules import AmDemod, DcBlock, FmDemod, Limit, NfmDeemphasis, Agc, WfmDeemphasis, FractionalDecimator, RealPart
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from pycsdr.types import Format, AgcProfile
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class Am(BaseDemodulatorChain):
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def __init__(self):
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agc = Agc(Format.FLOAT)
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agc.setProfile(AgcProfile.SLOW)
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agc.setInitialGain(200)
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workers = [
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AmDemod(),
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DcBlock(),
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agc,
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]
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super().__init__(workers)
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class NFm(BaseDemodulatorChain):
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def __init__(self, sampleRate: int):
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agc = Agc(Format.FLOAT)
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agc.setProfile(AgcProfile.SLOW)
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agc.setMaxGain(3)
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workers = [
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FmDemod(),
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Limit(),
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NfmDeemphasis(sampleRate),
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agc,
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]
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super().__init__(workers)
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class WFm(BaseDemodulatorChain):
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def __init__(self, sampleRate: int, tau: float):
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workers = [
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FmDemod(),
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Limit(),
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FractionalDecimator(Format.FLOAT, 200000.0 / sampleRate, prefilter=True),
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WfmDeemphasis(sampleRate, tau),
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]
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super().__init__(workers)
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def getFixedIfSampleRate(self):
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return 200000
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class Ssb(BaseDemodulatorChain):
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def __init__(self):
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workers = [
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RealPart(),
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Agc(Format.FLOAT),
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]
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super().__init__(workers)
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