Recording,storage and playback of GNSS signals

摘要

A radio receiver that implements downconversion of GNSS signals such as GPS/Galileo and GLONASS signals, in order to generate digital data bits at a low Intermediate Frequency or at baseband for recording/saving on digital storage media. A data interface able to accept additional data at the same time as the GNSS signal data is being recorded. A data combiner allowing data bits from the additional data stream to be inserted into the data samples being saved on the digital media. A replay function that reconstructs the additional data whilst replaying the GNSS data samples through a suitable upconverter to re-create the original GNSS signals, the additional data being provided on an external interface.