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This paper addresses an effective time delay tracking scheme for Galileo Ll open service (OS) systems. First, we observe that the correlation values between the time-delayed pseudo noise code and received signal remain almost unchanged, due to the multipath signals being received later than a line-of-sight signal. Based on this observation, we propose a novel delay tracking scheme for Galileo L1 OS...
Binary offset carrier (BOC) signal synchronization is one of the most important steps to recover the navigation data in global navigation satellite system (GNSS) including Galileo and global positioning system (GPS). The main error sources in synchronizing BOC signals are the multiple side-peaks in the BOC autocorrelation and the multipath delay. Recently, a novel correlator receiver for the BOC signal...
The early minus late discriminator based delay locked loop (EL-DLL), which is a general code tracking scheme of the global navigation satellite system (GNSS), has enormous time delay estimation bias (beta). The narrow correlated DLL (NC-DLL) and the double delta DLL (Delta(2)-DLL) were proposed as a beta reduction scheme, where Delta means the spacing between early and late correlation sample. However,...
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