Extending Narrow-Correlator Technology to P(Y)-Code Receivers: Benefits and Issues

Steven Karels, Thomas Macdonald, Mats Viggh, Robert Balla

Abstract:	The objective of this study was to investigate the benefits of extending narrow-correlator techniques, currently used in some commercial applications (i.e., NovAtel), to P(Y)-code military GPS receivers. An analysis was conducted on the performance of standard C/A-code, narrow-correlator C/A- code, standard P(Y)-code, and a hypothetical narrow-corre- lator P(Y)-code GPS receiver. The effects of multipath on the code tracking loops for each candidate system were analyzed. Estimates of code loop ranging performance versus carrier to noise density (C/NO) levels were obtained for each of the four candidate cases. Both ground and aircraft multipath errors were estimated. Differential GPS error budgets were gener- ated for each of the candidate systems. Issues such as GPS Space Vehicle (SV) output RP bandwidth versus receiver performance are considered and recommendations regarding the GPS SVs are presented. The study indicates that the addi- tional improvements in overall GPS receiver performance obtained in commercial GPS receivers over standard C/A-code receivers may be extended to military (P(Y)-code) GPS receivers but only if the GPS SV spectral output is per- mitted to increase.
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:	127 - 132
Cite this article:	Karels, Steven, Macdonald, Thomas, Viggh, Mats, Balla, Robert, "Extending Narrow-Correlator Technology to P(Y)-Code Receivers: Benefits and Issues," 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. 127-132.
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