Precise Positioning for Mass-Market: Optimal Data Dissemination Demonstrator

Register for the Final Presentation of the NAVISP EL1 036 BIS Project: "Precise Positioning for Mass-Market: Optimal Data Dissemination Demonstrator"

The main issue in the development of precise positioning is the way to send GNSS corrections. To handle this case, a terrestrial broadcast mechanism based on DAB+ (Digital Audio Broadcasting) signals is chosen to overcome the scalability challenges as it would allow a service provider to transfer assistance data based on a "one-to-many" scheme.  DAB is easy to be widely deployed with large coverage predictions carried using ATDI's HTZ simulator. 

The DAB+ reception demonstrator uses SSRZ, a compressed and compact State Space Representation corrections format developed by Geo++. SSRZ corrections were generated using data from Teria's CORS network and have been broadcasted over the air with DAB+ signals. To validate the SSRZ corrections, the "Record&Replay" technique has been used. It consists of digitizing GNSS signals during a normal field test. Once data is collected and validated, replays have been executed in the laboratory. Different scenarios were set up to validate the accuracy of the position with SSRZ corrections sent via DAB+ and the convergence to the corrected position after ambiguity loss. The results show the accuracy was acceptable when the user stays close to the transmitting DAB+ antenna (<10km). The lower performance might result from broadcast limitations in urban environments.

EL1-036 “Advanced Concept for Chip-Scale Atomic Clocks" was funded by NAVISP Element 1, which is dedicated to technology innovation of the European industry in the wide PNT sector.

Please check the Agenda and register for the event!