NoiseGenerator

This class implements the generation of different types of noise. It provides a generic interface that can be implemented by different types of generators. The characteristics of the generated noise is determined by the generators. See the appropriate documentation for more information.

White

The noise is Gaussian with a standard deviation sigma. The noise is computed via a pseudo random sequence with a start value given by initRandom. The same value always yields the same sequence. Be careful in parallel mode as all nodes generates the same pseudo random sequence. If this value is set to zero a real random value is used as starting value.

Name	Type	Annotation
sigma	double	standard deviation
initRandom	uint	start value for pseudo random sequence, 0: real random

ExpressionPSD

This generator creates noise defined by a one sided PSD. The psd is an expression controlled by the variable 'freq'. To determine the frequency sampling must be given.

Name	Type	Annotation
noise	noiseGenerator	Basis noise
psd	expression	one sided PSD (variable: freq [Hz]) [unit^2/Hz]
sampling	double	to determine frequency [seconds]

Filter

Generated noise noise is filtered by a filter.

Name	Type	Annotation
filter	digitalFilter	digital filter
noise	noiseGenerator	Basis noise
warmupEpochCount	uint	number of additional epochs at before start and after end
overSamplingFactor	uint	noise with multiple higher sampling -> filter -> decimate

PowerLaw

This generator creates noise that conforms to a power law relationship, where the power of the noise at a frequency is proportional to $1/f^\alpha$, with a typically between -2 and 2.

Name	Type	Annotation
noise	noiseGenerator	Basis noise
alpha	double	Exponent of the power law relationship 1/f^alpha