SRX-SW Defined Receiver
Last Updated: 20/11/2024 12:43 Created at: 20/11/2024 12:03
Final presentation summary – EL2-051: “SRX-SW Defined Receiver”
On Tuesday, November 12th, 2024, IFEN (DE) and IGASPIN (AT) presented the results of the project NAVISP EL2-051 “SRX-SW-Defined Receiver for eXact PNT”. This project focused on advancing GNSS software receiver technology for robust and precise positioning in challenging environments like dense forests and urban canyons. The SRX receiver represents a leap in GNSS capabilities by addressing signal interference and degradation with state-of-the-art algorithms and hardware innovations.
The project developed around three key objectives: supporting forest application scenarios, transitioning from third generation to fourth generation GNSS SDR (Software Defined Radio) receivers, and enhancing PVT (Position, Velocity, and Timing) accuracy through advanced algorithms. SRX introduced a dual-RF, multi-frequency GNSS receiver prototype that demonstrated significant improvements in signal tracking and positioning accuracy.
Innovative methods like Synthetic Aperture Processing, Slope-Based Multipath Estimation, and adaptive purity thresholds overcame multipath interference and low-visibility challenges. These developments enabled SRX to achieve RTK positioning under degraded signal conditions with accuracy targets of 50 cm in controlled environments.
Testing included forest and urban scenarios which showed SRX's enhanced performance over conventional receivers. While initial trials in forests achieved position accuracies of ~50 cm in limited conditions, further development of meta-signal processing and integration with MEMS-IMU will address remaining challenges. Additional improvements, like expanding GNSS constellation support and refining algorithms, are planned for future deployments.
The SRX project was funded under NAVISP Element 2, aiming at maintaining and improving European and Canadian industrial capability and competitiveness.
The slides are accessible here.