Two-Stage Variable Sample-Rate Conversion System

A two-stage variable sample-rate conversion (SRC) system has been proposed as part of a digital signal-processing system in a digital communication radio receiver that utilizes a variety of data rates. The proposed system would be used as an interface between (1) an analog-to-digital converter used in the front end of the receiver to sample an intermediate-frequency signal at a fixed input rate and (2) digitally implemented tracking loops in subsequent stages that operate at various sample rates that are generally lower than the input sample rate.