Transmitter Observer

This section contains a description of the SkydelTransmitterObserverInterface supported by Skydel.

Real Time Spoofers/Interferences Data

During simulation initialization, Skydel will ask for a SkydelRuntimeTransmitterObserver* from every plug-in via the createRuntimeTransmitterObserver method. It's mandatory to fully give the ownership of the returned pointer to Skydel.

This role provides detailed information about each transmitter. A transmitter can broadcast interference signals such as spoofers and interferences. During the simulation, Skydel will send transmitters data at 1000 Hz via the pushTransmitters method with the following data structure:

TimedTransmitters	Definition	Unit
elapsedTimeMs	Simulation elapsed time	millisecond
interferences	Simulated interferences	vector of Transmitter
spoofers	Simulated spoofers	vector of Transmitter

Transmitter	Definition	Unit
id	Unique ID among transmitters	-
name	User-friendly name for the transmitter	-
colorName	Transmitter color in Skydel UI	-
position(x, y, z)	Transmitter position	meter
orientation(roll, pitch, yaw)	Orientation is in NED reference frame	radian
isEnabled	When false, no signals are broadcast	-
isMasked	When false, no signals are broadcast	-
usingManualPropagationLoss	When false, free-space-loss is used. When true, manual loss is used	-
referencePower	Transmitter reference power	dBm
range	Distance to vehicle	meter
elevation	Elevation of this transmitter from the vehicle	radian
azimuth	Azimuth of this transmitter from the vehicle	radian
interferenceSignals	All signals associated with this transmitter	vector of InterferenceSignal

InterferenceSignal	Definition	Unit
id	Unique ID among signals from the transmitter	-
isEnabled	When false, signal is not broadcast	-
centerFrequency	Signal center frequency	Hz
propagationLoss	Propagation loss	dB
gainAtTransmitter	Transmitter antenna gain in the direction pointing to the vehicle	dB
gainAtVehicle	Vehicle(receiver) antenna gain in the direction pointing to the transmitter	dB
signalPower	Power relative to transmitter, NaN if spoofing signal	dB
typeName	Type of transmitter	-

typeName can have the following values: Spoof, CW, Chirp, Pulse, BPSK, BOC, AWGN or IQ file.

String ID Uniqueness

Implementors should be careful not to rely on global uniqueness of ID strings. A spoofer and a transmitter can share identical ID strings and identical names. However, Skydel guarantees that IDs are unique among spoofer transmitters and IDs are unique among interference transmitters.

Dynamic User Interface

Same as SkydelPositionObsereverInterface; see here for more detail.

Example

See the plug-in example transmitter_observer_plugin for more information. It covers:

• Receiving real time spoofers/interferences data

• Updating the user interface

• Logging in the temporary folder

• Sending spoofers/interferences data on the network