Skydel Wavefront

Protecting your GNSS systems from jamming and spoofing is more critical now than ever. This type of resilience is accomplished with an advanced GNSS Simulator capable of generating dedicated RF signals to test CRPA (Controlled Reception Pattern Antenna) architecture.

Safran’s GSG-Wavefront shared LO design (Shared Local Oscillator) is a field-proven “off-the-shelf” customizable and easy-to-use CRPA receiver testing platform. It provides an affordable and upgradable solution that leverages Skydel, its robust GNSS simulation engine built on a software-defined architecture.

CRPA are based on multi-element antennas designed to reduce the effects of RF interference, or establish signals’ angle of arrival. GSG Wavefront simulators emulate and generate the GNSS and interference signals as outputs of the antennas elements. The GSG Wavefront approach is different from classical anechoic CRPA Tester systems : it simulates the multi-elements antenna by providing as many RF outputs as antenna elements, to test the CRPA unit.

• Advanced Interference Generation Module

  Generation of simple and complex interference signals is easy with Skydel’s “advanced jammers” module. Using a dedicated RF output of an SDR, interference signals can then be mixed to the GNSS signals. The interference can either be in-band or out-of-band and be composed of many waveforms of different power levels.

  • Multiple virtual transmitters with user defined trajectories and waveforms
  • User-defined waveforms (Chirp, CW, BOC, BPSK, AWGN & pulse modulations combination)
  • Transmit arbitrary IQ data from file
  • Dynamics are applied to transmitted signals

• Scalable Architecture

  The system architecture can scale up and down depending on the number of elements and signals, which dictates the number of GPU’s, computers, and so forth. The architecture starts with having simulator nodes. Each node corresponds to an element of the CRPA and is dedicated to simulating all the signals for that specific element. So, if you were to have a seven-element CRPA, you would use seven nodes to accomplish the simulation. Each node simulates the low power GNSS or “truth” signals, as well as the high-power signals such as jammers and spoofers. There are two different RF paths, which allows you to manage a huge dynamic range in power. Then the proper signals are sent to the RF distribution module at the bottom, where they are combined and brought to a specific element. The RF distribution module also provides a feedback loop to the simulator controller.