期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2012
卷号：41
期号：2
页码：214-219
出版社：Journal of Theoretical and Applied
摘要：Both, the modernized GPS and Galileo, the new European Global Navigation Satellite System (GNSS), plan to incorporate in their signal schemes the Binary Offset Carrier (BOC) modulation. This modulation provides several advantages with respect to the Binary Phase Shift Keying (BPSK) modulation. Among others, it provides a significant reduction of the code tracking error. Code tracking accuracy is an important aspect of the GPS/Galileo navigation services. Errors in the code tracking affect the pseudorange computation and thus the GNSS based position performance. To support the design of future GPS/Galileo receivers, this paper provides analytical and numerical analysis of the code tracking accuracy for GPS/Galileo signals utilizing BOC modulation as a function of key parameters like carrier-to noise density (C/N0), receiver bandwidth, and Early-Late correlator spacing. It will be showed that a remarkable performance improvement is obtained when compared with signals utilizing BPSK modulation.
关键词：Code Tracking Error; Galileo; GPS; GNSS; Band Limited Recievers
