Nt1310 Unit 5 Lab Report

Galileo signal plan is separated in major bands in which are broadcasted 10 different navigation signals. The Galileo E1-L1-E2 have a center frequency of 1575 MHZ with a code frequency 1.023MHz. band coincides with the GPS L1 band, but is wider. The E5 band is 92.07 MHz wide and centered at 1,191.795 MHz It is partitioned into E5a and E5b sub bands, with carrier frequencies of 1,176.45 and 1,207.14 MHz. The E5a sub band coincides with the GPS L5 band, while the E5b sub band overlaps the GLONASS
L3 band. The E6 and E1-L1-E2 bands are both 40.92 MHz wide and centered at
1278.75 and 1575.42 MHz. For the data-free, or pilot, signals, a 100-ms code repetition period is used to ensure that the code length is not less than the satellite-to-user distance. Different …show more content…
The data components of the E5 signals, E5a-d and E5b-d, are broadcast in phase with respect to the carriers, while the pilot components, E5a-p and E5b-p, are broadcast in Quadra phase.
The E5a and E5b signals are broadcasted by Galileo satellites as a combined signal multiplex. This enables them to share a single transmitter and provides the users with the option of tracking a single wideband signal, instead of separate signals, to obtain more accurate pseudo-range measurements. However, because the E5a-d and E5b-d signals carry different navigation data messages, standard BOC modulation cannot be used. Instead, an alternate-binary-offset-carrier (AltBOC) modulation scheme has been developed with a 15.345-MHz subcarrier frequency and
10.23-Mchip s−1 spreading code chipping rate. This permits differentiation of

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