An Enhanced FGI-GSRx Software-Defined Receiver for the Execution of Long Datasets.

Area of Science:

• Geodesy and Geomatics
• Satellite Navigation Systems
• Software Engineering

Background:

• Software-defined receivers (SDRs) offer advantages over hardware-based systems in Global Navigation Satellite System (GNSS) applications.
• Continuous advancements in GNSS research necessitate frequent upgrades to SDRs for optimal performance.
• The Finnish Geospatial Research Institute (FGI) provides open-source GNSS SDR tools like FGI-GSRx and FGI-OSNMA.

Purpose of the Study:

• To introduce an updated version of the FGI-GSRx, specifically FGI-GSRx-v2.0.0, enhancing its capabilities for processing long datasets.
• To improve the performance and efficiency of GNSS software-defined receivers for research and development.
• To provide the research community with an advanced, open-source GNSS SDR resource.

Main Methods:

• Optimization of receiver functionality in FGI-GSRx-v2.0.0.
• Implementation of a new parallel processing feature for faster raw GNSS data handling.
• Analysis of design aspects comparing FGI-GSRx previous and current versions.
• Execution and performance evaluation using MATLAB's parallel computing toolbox.

Main Results:

• FGI-GSRx-v2.0.0 demonstrates significant performance improvements, especially with long datasets.
• Sequential processing shows a 40% runtime improvement, while parallel processing achieves a 59% improvement over v1.0.0.
• Integration with MATLAB's parallel computing toolbox yielded an additional 43% execution time improvement.

Conclusions:

• FGI-GSRx-v2.0.0 offers substantial performance gains, particularly in parallel processing, for GNSS data analysis.
• The updated open-source receiver facilitates more efficient adaptation, optimization, and testing of future GNSS capabilities.
• The enhanced FGI-GSRx empowers the research community with advanced tools for next-generation GNSS applications.