![]() ![]() Indeed, phase noise problems, the higher free space attenuation (related to the use of omni directional antennae) and the strong signal attenuation due to rain made all the proposed solutions not adequate for the first Galileo constellation. At the time, a dedicated portion of the C-band was assigned for Radio-Navigation, but technical complexities made it impossible for the first generation of Galileo. Thus, the search of other free frequency resources is something that will occur with a high probability in the next years.ĭuring the World Radio Conference 2000 (WRC-2000), the Galileo program obtained authorization to use C-band frequencies between 50 MHz. ![]() Nevertheless even those bands that have not been used yet will certainly be shared by many systems in the near future. This is especially true on the E1/L1 band. The Radio-Navigation Satellite Service (RNSS) portion of the RF spectrum is overcrowded. Table 4: Galileo E5 signal technical characteristics. Therefore, as shown in Galileo OS SIS ICD, the transmitted Galileo E6 signal consists of the following components, both (pilot and data components) are combined on the same carrier component, with a power sharing of 50 percent: Both channels allow to encrypt the information at signal level.Į6 signals are modulated with a binary phase shift keying BPSK(5) at a carrier frequency of 1278.75 MHz, which is used by all satellites and shared though a CDMA RF channel access mode. Two dedicated signals are transmitted on the E6 band (1260-1300 MHz): a data component (E6-B) component allowing the transmission of 448 bits per second and a pilot (E6-C) component. Table 2: Galileo E1 signal technical characteristics.
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