Galileo OS SIS ICD.indd - GSA - Europa

2.4. Logic Levels
The correspondence between the logic level code bits used to modulate the signal and
the signal level is according to the values stated in Table 10.
2.5. Transmitted Signal Phase Noise
Logic Level Signal Level
1 -1.0
0 +1.0
Table 10. Logic to Signal Level Assignment
The phase noise spectral density of the un-modulated carrier will allow a second-order
phase locked loop with 10 Hz one-sided noise bandwidth to track the carrier to an
accuracy of 0.04 radians RMS.
2.6. Transmitted Signals Code/Data Coherency
The edge of each data symbol coincides with the edge of a code chip. Periodic spreading
codes start coincides with the start of a data symbol.
The edge of each secondary code chip coincides with the edge of a primary code chip.
Primary code start coincides with the start of a secondary code chip.
2.7. Received Power Levels on Ground
2.7.1. Minimum Levels
The Galileo satellites will provide Galileo E5, E6 and E1 signals strength in order to
meet the minimum levels specifi ed in 0. The minimum received power on ground is
measured at the output of an ideally matched RHCP 0 dBi polarized user receiving
antenna when the SV elevation angle is higher than 10 degrees.
Signal Signal Component
E5
E6
E1
E5a (total I+Q)
(50/50% I/Q power sharing)
E5b (total I+Q)
(50/50% I/Q power sharing)
E6 CS (total B+C)
(50/50% E6-B/E6-C power sharing)
E1 OS/SoL (total B+C)
(50/50% E1-B/E1-C power sharing)
10 © European Union 2010
Document subject to terms of use and disclaimers p. ii-iii
OD SIS ICD, Issue 1, February 2010
Total Received
Minimum Power (dBW)
-155
-155
-155
-157
Table 11. Received Minimum Power Levels on Ground
For a 5 degree user elevation angle, the user minimum received power will typically be
0.25 dB lower than specifi ed in Table 11 above.
2.7.2. Maximum Levels
The Galileo terrestrial user’s maximum received signal power level is, using the same
assumptions as for the minimum received power, not expected to exceed 3 dB above
the corresponding minimum received power.