DIFFERENTIAL ENCODING REVEALED: AN EXPLANATION OF THE TIER-1 DIFFERENTIAL ENCODING IN IRIG 106
Author
Rice, MichaelAffiliation
Brigham Young UniversityIssue Date
2007-10
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Copyright © held by the author; distribution rights International Foundation for TelemeteringCollection Information
Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.Abstract
IRIG 106-04 specifies differential encoding for use with the interoperable Tier-1 modulations to deal with phase and delay-axis ambiguities associated with PLL-based carrier phase synchronization. The origins of the differential encoding have been shrouded in the mists of an unavailable technical report and a mysterious connection to previous published work in the open literature. This paper removes the mystery by showing that the differential encoding rule results from encoding bit-by-bit transitions in the phase trajectory of an offset QPSK modulated carrier.Sponsors
International Foundation for TelemeteringISSN
0884-51230074-9079