torchsig.transforms.transforms.TimeVaryingNoise

class torchsig.transforms.transforms.TimeVaryingNoise(noise_power_low=(-80.0, -60.0), noise_power_high=(-40.0, -20.0), inflections=[0, 10], random_regions: list | bool = True, **kwargs)

Bases: SignalTransform

Add time-varying noise to signal regions.

This transform adds noise with power levels that vary over time, with specified minimum and maximum power levels and number of inflection points.

noise_power_low

Range bounds for minimum noise power in dB.

noise_power_low_distribution

Random draw from noise_power_low distribution.

noise_power_high

Range bounds for maximum noise power in dB.

noise_power_high_distribution

Random draw from noise_power_high distribution.

inflections

Number of inflection points over IQ data.

inflections_distribution

Random draw from inflections distribution.

random_regions

Inflections points spread randomly (True) or evenly (False).

random_regions_distribution

Random draw from random_regions distribution.

Methods

add_parent	Add parent Seedable object and set up RNGs accordingly.
get_distribution	Create distribution function with proper seeding.
get_second_seed	Gets second seed, usually used to seed both torch and numpy generators with slightly different seeds.
seed	Seed number generators with given seed.
setup_rngs	Initialize torch and numpy number generators, and update its children.
update_from_parent	Update numpy and torch number generators with parent seed.

__init__(noise_power_low=(-80.0, -60.0), noise_power_high=(-40.0, -20.0), inflections=[0, 10], random_regions: list | bool = True, **kwargs)

Initialize the TimeVaryingNoise transform.

Parameters:

• noise_power_low – Range bounds for minimum noise power in dB. Defaults to (-80.0, -60.0).

• noise_power_high – Range bounds for maximum noise power in dB. Defaults to (-40.0, -20.0).

• inflections – Number of inflection points over IQ data. Defaults to [0, 10].

• random_regions – Inflections points spread randomly (True) or evenly (False). Defaults to True.

• **kwargs – Additional keyword arguments passed to the parent class.

__call__(signal: Signal) → Signal

Validates signal, performs transform, updates bookeeping, (optionally) enforces data type.

Parameters:

signal – Signal to be transformed.

Returns:

Transformed signal.

__repr__() → str

Transform string representation.

Should be able to recreate class from this string.

Returns:

Transform representation.

__str__() → str

String representation of the transform.

Returns:

String representation of the transform.

add_parent(parent: Seedable, register: bool = True) → None

Add parent Seedable object and set up RNGs accordingly.

Parameters:

• parent – Parent Seedable object to add.

• register – If True (default), add self to parent.children so that future seed propagation reaches this object. Pass False for transient objects (e.g. per-sample Signal instances) that only need the parent link for metadata/RNG access during their lifetime but must not accumulate in the parent’s child list, which would otherwise cause unbounded memory growth.

get_distribution(params: list | tuple | float, scaling: str = 'linear') → Distribution

Create distribution function with proper seeding.

Parameters:

• params – Parameters for distribution.

• scaling – Scaling param for distribution. Defaults to ‘linear’.

Returns:

Distribution function, seeded.

Return type:

Distribution

get_second_seed(seed: int) → int

Gets second seed, usually used to seed both torch and numpy generators with slightly different seeds.

Parameters:

seed – Seed to use.

Returns:

New seed.

seed(seed: int) → None

Seed number generators with given seed.

Parameters:

seed – Seed to use.

setup_rngs() → None

Initialize torch and numpy number generators, and update its children.

update_from_parent() → None

Update numpy and torch number generators with parent seed.