Design and Realization of the Filter for SDR Digital Intermediate Frequency Receiver Based on GC4016

IF(intermediate frequency)digitalization is a critical technology in software defined radio(SDR) system design.Based on multi-channel DDC——GC4016 chip produced by Graychip Inc.,a design method for IF digital multi-rate filters is presented according to the relationship between RF,baseband and IF.Then analysis is made and simulation is performed.Finally,this method is validated in project and the desired purpose is achieved.