Compact Circuitry for GLONASS Reception

Oliver Leisten

Abstract:	The structure of a GLONASS Ll receiver that is related to and derived from Navstar Systems G.P.S. integrated chip-set is presented. The use of the chip-set to work GLONASS was anticipated in the design of the device structure and frequency plan of the XR5 G.P.S. system with the result that a relatively compact and capable GLONASS Ll receiver is configurable. The receiver utilises the 20 MHz master oscillator of the XR5 G.P.S. instrument in a receiver/ synthesiser system that achieves phase noise advantage by means of a dual stage: Aff,,, = 0.5 MHz and derived Af,, = 0.0625 MHz local oscillator systems. The structure of the GLONASS receiver is similar to that of the XR5 GPS receiver except for the addition of a single synthesiser chip. Careful design of the local oscillator phase locked loop to ensure viable receiver phase noise performance has highlighted the importance of the phase detector gain parameter. The receiver facilities a sequencing GLONASS receiver of 6.75 inch x 3 inch x 2.5 inch size which is capable of tight integration with GPS. Both GLONASS and GPS inputs can be processed by the same Navstar Systems designed multi-channel D.S.P. device. Some system configurations are examined.
Published in:	Proceedings of the 7th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1994) September 20 - 23, 1994 Salt Palace Convention Center Salt Lake City, UT
Pages:	453 - 459
Cite this article:	Leisten, Oliver, "Compact Circuitry for GLONASS Reception," Proceedings of the 7th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1994), Salt Lake City, UT, September 1994, pp. 453-459.
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