Abstract
The software design, implementation, and preliminary test of a GNSS Baseband Logging System, which records baseband GNSS L1 signals in real-time, is presented herein. The RF Front-End of this GNSS Baseband Logger, centered at the GPS L1 frequency, has enough bandwidth to include (or receive) GPS, GLONASS, Galileo, and Compass L1 signals without truncation which is essential for baseband processing. Existing software defined radio open source GNSS projects have been proposed, developed, and implemented into a PC Data Processing Terminal of the system with several off-line functions such as FFT-based acquisition, GPS (or GNSS) positioning, and Carrier/Noise ratio analysis. A brief description of the design and performance of the GNSS logging system is supported by the observed experimental data.
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