Further Investigations into C/A-to-C/A Interference

A.P. Cerruti, J.W. Betz, J. Rushanan

Abstract:	Previous work by a number of authors has investigated C/A-to-C/A interference—that is, interference to the reception of a desired C/A code satellite navigation (satnav) signal from other C/A code satnav signals. Like all other satnav-signal-to-satnav-signal interference, the effects of C/A-to-C/A interference on correlator output signal-to-noise ratio (SNR) can be modeled by the introduction of an amount of additional white noise at the receiver input, causing the same degradation to correlator output SNR as does the C/A-to-C/A interference. This additional white noise, called the effective noise density of C/A-to-C/A interference, has the same effect on carrier tracking, data message demodulation, and initial synchronization processing as does the C/A-to-C/A interference. Unlike for other satnav-signal-to-satnav-signal interference, this effective noise density of C/A-to-C/A interference varies significantly over receiver locations and time scales on the order of minutes, with values that range from insignificant to the single largest source of in-band interference to C/A code signal reception. There is an ongoing effort to develop models that accurately represent effect of C/A-to-C/A interference on receiver performance. This paper presents results from detailed computer simulation of a specific interference scenario that can serve to assess such models.
Published in:	Proceedings of the 2014 International Technical Meeting of The Institute of Navigation January 27 - 29, 2014 Catamaran Resort Hotel San Diego, California
Pages:	349 - 361
Cite this article:	Cerruti, A.P., Betz, J.W., Rushanan, J., "Further Investigations into C/A-to-C/A Interference," Proceedings of the 2014 International Technical Meeting of The Institute of Navigation, San Diego, California, January 2014, pp. 349-361.
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