A complete GPS time solution or precision GPS, in 1¼" cu in.

Brendan Giles, Mamdouh Yanni and Peter Anderson

Abstract:	The paper describes how the timing features of the XR7 GPS timing microcontroller can be put to service in many ways. Examples will include the time stamping of base station received signals, such as is an integral part of many proposed mobile phone positioning systems. Also described are methods by which the internal timer can be used to monitor a backup time reference, so that the complete system has a holdover capability in the event of loss of GPS even though there is no on-board ovenised reference. The same facility can be used to monitor, or even control, the customer’s own ovenised oscillator. In this latter case a 2-wire serial controller interfaces via an I2C chip to a standard varactor control circuit. In this way the timing algorithms can be integrated to run on the XR7’s integrated ARM7TDMI™ processor, instead of requiring a separate processor.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	923 - 932
Cite this article:	Giles, Brendan, Yanni, Mamdouh, Anderson, Peter, "A complete GPS time solution or precision GPS, in 1¼" cu in.," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 923-932.
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