Optimal Aligning of GNSS Navigation Signals Sum

Vladimir Kharisov and Alexander Povalyaev

Abstract:	GNSS current development assumes broadcasting a set of binary navigation signals on one carries frequency. Sum of two and more signals has varying amplitude that reduces the power amplifier efficiency. This effect results the need for group signal amplitude aligning. This paper presents the comparison of optimal aligning with other well-known aligning methods (like AltBOC or interplex modulation) includes the overview of signal aligning methods. New symmetrized signals class, ensuring significant reduce of aligning loss factor, is introduced. For instance, use of interplex modulation for three equipollent binary phase signals results in 25% power loss, while optimal aligning with symmetrization provides only 12.7% loss. The use of optimal aligning for four signals provides 14.64% loss. Methodology of choosing best signal combination is described. As an example, there were found optimal combination of 3 and 4 signals. GLONASS L3 and L5 signals design based on summarizing AltBOC modulation theory is proposed.
Published in:	Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011) September 20 - 23, 2011 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	3141 - 3155
Cite this article:	Kharisov, Vladimir, Povalyaev, Alexander, "Optimal Aligning of GNSS Navigation Signals Sum," Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011), Portland, OR, September 2011, pp. 3141-3155.
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