Operational Considerations for C/A Code Tracking Errors Due to Cross Correlation

Zhen Zhu and Frank van Graas

Abstract: Cross correlation occurs for the GPS C/A codes when the received Doppler frequency shift difference between two satellites is close to an integer number of kHz. Cross correlation errors affect the C/A code phase and carrier phase measurements as well as the carrier-to-noise ratio (C/N0) estimation. On average, one pair of satellites experiences cross correlation at any given time. This paper evaluates the impact of cross correlation on the C/A code phase and C/N0 estimation based on a combination of computer simulations and receiver bench tests. Following the error characterization, operational considerations are provided for applications that may be affected by cross correlation.
Published in: Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005)
September 13 - 16, 2005
Long Beach Convention Center
Long Beach, CA
Pages: 1255 - 1262
Cite this article: Zhu, Zhen, van Graas, Frank, "Operational Considerations for C/A Code Tracking Errors Due to Cross Correlation," Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005), Long Beach, CA, September 2005, pp. 1255-1262.
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