ADVISE - Advanced Signal-In-Space Techniques

AdviseSignalGenerator.pngThis project aims at investigating advanced signal design techniques for future radio navigation signals in L-, S- or C- bands. The study is meant to be nonspecific of a particular radiofrequency band and bandwidth, but intended to be of a parametric kind instead.

The aspects of interest in this activity fall in the area of Signal-In-Space Modulation and Data Delivery (also known as message coding). A non-exhaustive list of topics is provided in the following:


  • Capability to support efficiently different channels on the same carrier allowing separate reception, e.g. pilot and data channel, or several data channels, etc.
  • Co-existence with other systems: low out-of-band emissions and high spectral separation.
  • The robustness to payload linear and nonlinear distortions.
  • The efficiency in the exploitation of the available bandwidth in terms of spectrum occupation.
  • The acquisition and tracking performance and robustness in realistic propagation channels.


Data Delivery

  • Robustness of data delivery to fading, shadowing and link obstruction in realistic propagationAdviseDataDeliverytool.png channels.
  • Support of spatial and time diversity (MIMO).
  • Support of different protection for different parts of the message.
  • Low Time-to-First-Fix and aiding to acquisition of other GNSS signals.
The study requires a significant number of analyses and trade-offs among different alternatives by means of analytical mathematical models and simulation tools developed ad-hoc.


Funded by:



Elias Gkougkas, Dominik Dötterböck

European Space Agency (ESA)

Beginning 2010

Wireless Systems Engineering and Research (Italy), École nationale de l’aviation civile (France), Joanneum Research (Austria)