R&S®SMIQ-B51 Digital Standard GPS
Key Facts
The signals of the individual satellites (with identical carrier frequency) can be distinguished by means of special codes (with GPS, these are known as C/A codes). Information on time and satellite orbit is contained in the navigation data emitted by each satellite. In this case, the C/A codes are used as spreading codes (similar to CDMA systems) for the navigation data.
Each GPS satellite emits an individual navigation data sequence spread by the C/A code assigned to it at the carrier frequency L1=1.57542 GHz (civilian GPS). A signal of this type, which allows basic receiver function tests to be carried out, can be generated by SMIQ for one satellite.
