Abstract
In this paper we develop a prototype software GPS receiver. The receiver consists of a RF front-end, an ADC, and a software GPS program that runs on PC. The RF front-end down-converts the signal from RF to IF, and the ADC samples the IF signal. All the other processing including signal acquisition, tracking, data decoding, and solving position are all implemented in software using signal processing techniques. The local C/A codes and carrier replica signal are pre-generated, stored in memory, and used repetitively during signal acquisition and tracking. The concepts of the prototype software GPS receiver can be applied to next generation GNSS and SBAS receivers design.
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