def applyAmplitude(self, signal, userTimeAll_s, noiseParams):
'''
Applies amplitude modulation to signal.
This method applies polynomial modulation.
Parameters
----------
signal : numpy.ndarray
Signal sample vector. Each element defines signal amplitude in range
[-1; +1]. This vector is modified in place.
userTimeAll_s : numpy.ndarray
Sample time vector. Each element defines sample time in seconds.
noiseParams : NoiseParameters
Noise parameters to adjust signal amplitude level.
Returns
-------
numpy.ndarray
Array with output samples
'''
poly = self.poly
if poly is not None:
amplitudeVector = poly(userTimeAll_s)
amplitudeVector = AmplitudeBase.convertUnits2Amp(
amplitudeVector, self.units, noiseParams)
signal *= amplitudeVector
else:
amplitude = AmplitudeBase.convertUnits2Amp(1., self.units,
noiseParams)
signal *= amplitude
return signal
def test_AmplitudeBase_convertVolts():
'''
Generic tests for AmplitudeBase conversion to volts
'''
noiseParams = NoiseParameters(1e6, 1.)
assert 4. == AmplitudeBase.convertUnits2Amp(4.,
AmplitudeBase.UNITS_AMPLITUDE,
noiseParams)
assert 2. == AmplitudeBase.convertUnits2Amp(4., AmplitudeBase.UNITS_POWER,
noiseParams)
assert 20. == AmplitudeBase.convertUnits2Amp(100, AmplitudeBase.UNITS_SNR,
noiseParams)
assert 2. == AmplitudeBase.convertUnits2Amp(0., AmplitudeBase.UNITS_SNR_DB,
noiseParams)
def applyAmplitude(self, signal, userTimeAll_s, noiseParams):
'''
Applies amplitude modulation to signal.
Parameters
----------
signal : numpy.ndarray
Signal sample vector. Each element defines signal amplitude in range
[-1; +1]. This vector is modified in place.
userTimeAll_s : numpy.ndarray
Sample time vector. Each element defines sample time in seconds.
noiseParams : NoiseParameters
Noise parameters to adjust signal amplitude level.
Returns
-------
numpy.ndarray
Array with output samples
'''
ampAll = numpy.sin(userTimeAll_s * self.c) * self.amplitude + self.initial
ampAll = AmplitudeBase.convertUnits2Amp(ampAll,
self.units,
noiseParams)
signal *= ampAll
return signal
def test_AmplitudeBase_convertVolts():
'''
Generic tests for AmplitudeBase conversion to volts
'''
noiseParams = NoiseParameters(1e6, 1.)
assert 4. == AmplitudeBase.convertUnits2Amp(4.,
AmplitudeBase.UNITS_AMPLITUDE,
noiseParams)
assert 2. == AmplitudeBase.convertUnits2Amp(4.,
AmplitudeBase.UNITS_POWER,
noiseParams)
assert 20. == AmplitudeBase.convertUnits2Amp(100,
AmplitudeBase.UNITS_SNR,
noiseParams)
assert 2. == AmplitudeBase.convertUnits2Amp(0.,
AmplitudeBase.UNITS_SNR_DB,
noiseParams)
def applyAmplitude(self, signal, userTimeAll_s, noiseParams):
'''
Applies amplitude modulation to signal.
This method applies polynomial modulation.
Parameters
----------
signal : numpy.ndarray
Signal sample vector. Each element defines signal amplitude in range
[-1; +1]. This vector is modified in place.
userTimeAll_s : numpy.ndarray
Sample time vector. Each element defines sample time in seconds.
noiseParams : NoiseParameters
Noise parameters to adjust signal amplitude level.
Returns
-------
numpy.ndarray
Array with output samples
'''
poly = self.poly
if poly is not None:
amplitudeVector = poly(userTimeAll_s)
amplitudeVector = AmplitudeBase.convertUnits2Amp(amplitudeVector,
self.units,
noiseParams)
signal *= amplitudeVector
else:
amplitude = AmplitudeBase.convertUnits2Amp(1.,
self.units,
noiseParams)
signal *= amplitude
return signal