Sampling Rate Determination for RF Integrated Front End of Multiple Satellite Navigation Systems

To acquire signals from all or parts of the four satellite navigation systems, which are GPS, Glonass, Galileo and Compass, in single navigation receiver, software radio methodology is used. In the design of the radio frequency (RF) integrated front end of the software radio, direct sampling rate determination is one of the important issue. Using public published spectrum distribution data of the four systems, direct sampling rate is determined. The results show that no aliasing direct sampling rate is between several tens mega hertz and several hundred mega hertz, some even lower than 92 MHz, according to the combination of the bands and systems.