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Digital Tone Ranging Modem: Design and Implementation
This report describes a digital ranging modem implementation based on side-tone ranging concepts. The ranging technique implemented and tested in the DOT/TSC avionics laboratory has direct application to the AEROSAT surveillance system. The performance of a breadboard unit was observed in the laboratory as well as under actual aeronautical and maritime experiments conducted with the NASA ATS-6 satellite. The technique demonstrated an acquisition probability of 0.98 for a signal-to-noise power density ratio, C/No, of 37 dB-Hz. The ranging precision of the modem (for C/No>50 dB-Hz) is less than 66 meters. Circuit schematics, test data, test results and analyses are included in this report along with recommendations for future applications of the demonstrated hardware.
Content Notes:
ATS-6 digital ranging modem description, Background, ATS-6 ranging configuration, Detailed circuit description, Laboratory tests, Test results and recommendations, Summary and conclusions, Modem specifications
Several modems and satellite subsystems were tested with the aid of an aeronautical channel simulation facility. The modems tested included a high per...
The report addresses signal design for the AEROSAT system. Candidate data and surveillance modems are analyzed for L-Band avionics. Detailed theoretic...
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