On the Inherent Tracking Error Caused by CEM and Imperfect Spreading Code of GNSS Signal

Jiayi Zhang, Zheng Yao, Jun Shen, Mingquan Lu

Abstract:	In current construction of global navigation satellite system (GNSS), an inherent code tracing bias has been found when separate receiving one of the signal components of constant envelope multiplexing (CEM) signal. It has been investigated that the bias inevitably occurs with the application of CEM, and the bias has different value at different early-late correlator spacing. To reveal the source of the bias, in this paper, correlation of CEM signal is expanded by using inter-modulation construction (IMC), thus the asymmetrical properties of correlation function can be observed. Based on the correlation result, a new optimization objective is proposed which controls the asymmetry of correlation functions, whereby a multi-objective optimization problem is formulated considering both CEM and spreading sequences.
Published in:	Proceedings of the 29th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2016) September 12 - 16, 2016 Oregon Convention Center Portland, Oregon
Pages:	2808 - 2815
Cite this article:	Zhang, Jiayi, Yao, Zheng, Shen, Jun, Lu, Mingquan, "On the Inherent Tracking Error Caused by CEM and Imperfect Spreading Code of GNSS Signal," Proceedings of the 29th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2016), Portland, Oregon, September 2016, pp. 2808-2815. https://doi.org/10.33012/2016.14807
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