Performance of Dual-Channel Codeless and Semicodeless Processing

John W. Betz, Alessandro P. Cerruti

Peer Reviewed

Abstract: While codeless and semicodeless processing are mature techniques used on the Global Positioning System (GPS) P(Y) signals, there is an absence of literature that provides comprehensive assessment of the different techniques’ performance, with derivations from first principles. This paper fills that gap. It provides mathematical models of three different dual-channel codeless or semicodeless processing approaches. Each approach exploits a situation where the same signal is transmitted on two different carrier frequencies, but the receiver cannot generate the complete signal replica for conventional receiver processing. The mathematical formulation leads to derivation of analytical models for the performance of this processing. The resulting performance models for the three techniques all have the same parametric form, though with different parameter values. The models apply to more general cases than have been provided previously, allowing any relationship between input signal-to-noise ratios, and addressing different signal design variants. Computer simulations crosscheck the analytical performance results, and comprehensive numerical results are provided. The results provide the foundation for a companion paper that assesses the effect of GPS III signal generation on these types of receivers.
Published in: Proceedings of the 2019 International Technical Meeting of The Institute of Navigation
January 28 - 31, 2019
Hyatt Regency Reston
Reston, Virginia
Pages: 583 - 597
Cite this article: Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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