DIFI: Satellite Ground Station Digital Modernization Initiative
White Papers
DIFI stands for digital intermediate frequency interoperability. The Digital Intermediate Frequency Interoperability (DIFI) standard (IEEE-ISTO Std 4900-2021) was developed to enable interoperability among digital Intermediate Frequency (IF) systems, especially in satellite communications (SATCOM). Also known as packetized Radio Frequency (RF), it enables the transmission of digitized in-phase and quadrature (IQ) data over Internet Protocol (IP) networks, allowing satellite signals to be processed flexibly and remotely.