Physical Devices

class StaticOperator(num_samples, sampling_rate)

Bases: object

Base class for static device operators

Parameters

• num_samples (int) – Number of samples per transmission.

• sampling_rate (float) – Sampling rate of transmission.

property num_samples: int

Number of samples per transmission.

Returns: Number of samples.

Return type

int

property sampling_rate: float

Return type

float

property frame_duration: float

Return type

float

class SilentTransmitter(num_samples, sampling_rate)

Bases: StaticOperator, Transmitter

Silent transmitter mock.

Parameters

• num_samples (int) – Number of samples per transmission.

• sampling_rate (float) – Sampling rate of transmission.

transmit(duration=0.0)

Transmit a signal.

Registers the signal samples to be transmitted by the underlying device.

Parameters

duration (float, optional) – Duration of the transmitted signal. If not specified, the duration will be inferred by the transmitter.

Return type

Transmission

Returns

Information generated while transmitting over this operator.

Raises

FloatingError – If the transmitter is currently considered floating.

class SignalTransmitter(num_samples, sampling_rate)

Bases: StaticOperator, Transmitter

Custom signal transmitter.

Parameters

• num_samples (int) – Number of samples per transmission.

• sampling_rate (float) – Sampling rate of transmission.

transmit(signal)

Transmit a signal.

Registers the signal samples to be transmitted by the underlying device.

Parameters

duration (float, optional) – Duration of the transmitted signal. If not specified, the duration will be inferred by the transmitter.

Return type

Transmission

Returns

Information generated while transmitting over this operator.

Raises

FloatingError – If the transmitter is currently considered floating.

class PowerReceiver(seed=None, reference=None, *args, **kwargs)

Bases: Receiver

Noise power receiver for the device noise floor estimation routine.

Parameters

• seed (int, optional) – Random seed used to initialize the pseudo-random number generator.

• reference (Device, optional) – Reference device to which the channel shall be estimated.

• *args – Operator base class initialization parameters.

• **kwargs – Operator base class initialization parameters.

property sampling_rate: float

The operator’s preferred sampling rate.

Return type

float

Returns

Sampling rate in Hz.

property energy: float

Return type

float

receive()

Receive a signal.

Pulls the required signal model and channel state information from the underlying device.

Return type

Reception

Returns

Information received by this operator.

Raises

FloatingError – If the transmitter is currently considered floating.

property frame_duration: float

Duration of a single sample frame.

Returns

Frame duration in seconds.

Return type

duration (float)

class SignalReceiver(num_samples, sampling_rate)

Bases: StaticOperator, Receiver

Custom signal receiver.

Parameters

• num_samples (int) – Number of samples per transmission.

• sampling_rate (float) – Sampling rate of transmission.

property energy: float

Return type

float

receive()

Receive a signal.

Pulls the required signal model and channel state information from the underlying device.

Return type

Reception

Returns

Information received by this operator.

Raises

FloatingError – If the transmitter is currently considered floating.

class PhysicalDevice(max_receive_delay=0.0, calibration_delay=0.0, *args, **kwargs)

Bases: Device

Base representing any device controlling real hardware.

Parameters

• *args – Device base class initialization parameters.

• **kwargs – Device base class initialization parameters.

property calibration_delay: float

Delay compensation of the device calibration.

Returns

Delay compensation in seconds.

Return type

float

abstract trigger()

Trigger the device.

Return type

None

property adaptive_sampling: bool

Allow adaptive sampling during transmission.

Returns: Enabled flag.

Return type

bool

property lowpass_filter: bool

Apply a digital lowpass filter to the received base-band samples.

Returns: Enabled flag.

Return type

bool

property lowpass_bandwidth: float

Digital lowpass filter bandwidth

Return type

float

Returns

Filter bandwidth in Hz. Zero if the device should determine the bandwidth automatically.

Raises

ValueError – For negative bandwidths.

property max_receive_delay: float

Maximum expected delay during signal reception.

The expected delay will be appended as additional samples to the expected frame length during reception.

Return type

float

Returns

The expected receive delay in seconds.

Raises

ValueError – If the delay is smaller than zero.

abstract property max_sampling_rate: float

Maximal device sampling rate.

Returns: The samplin rate in Hz.

Return type

float

property velocity: ndarray

Cartesian device velocity vector.

Returns

Velocity vector.

Return type

np.ndarray

Raises

• ValueError – If velocity is not three-dimensional.

• NotImplementedError – If velocity is unknown.

estimate_noise_power(num_samples=1000)

Estimate the power of the noise floor within the hardware.

Receives num_samples without any transmissions and estimates the power over them. Note that any interference in this case will be interpreted as noise.

Parameters

num_samples (int, optional) – Number of received samples. 1000 by default.

Returns

Estimated noise power at each respective receive channel, i.e. the variance of the unbiased received samples.

Return type

np.ndarray

transmit(clear_cache=True)

Transmit over this device.

Parameters

clear_cache (bool, optional) – Clear the cache of operator signals to be transmitted. Enabled by default.

Returns: Signal transmitted by this device.

Return type

Signal

receive(signal=None)

Receive over this device.

Parameters

signal (Signal) – The samples to be processed by the device.

Returns

The samples after processing.

Return type

Signal

calibrate(max_delay, calibration_file, num_iterations=10, wait=0.0)

Calibrate the hardware.

Currently the calibration will only compensate possible time-delays. Ideally, the transmit and receive channels of the device should be connected by a patch cable. WARNING: An attenuator element may be required! Be careful!!!!

Parameters

• max_delay (float) – The maximum expected delay which the calibration should compensate for in seconds.

• calibration_file (str) – Location of the calibration dump within the filesystem.

• num_iterations (int, optional) – Number of calibration iterations. Default is 10.

• wait (float, optional) – Idle time between iteration transmissions in seconds.

Returns

A figure of information regarding the calibration.

Return type

plt.Figure

load_calibration(calibration_file)

Recall a dumped calibration from the filesystem.

Parameters

calibration_file (str) – Location of the calibration dump.

Return type

None

PhysicalDeviceType

Type of phyiscal device.

alias of TypeVar(‘PhysicalDeviceType’, bound=PhysicalDevice)