D/A Design and Implementation of GNSS IF Signal Simulator
Dongkai Yang · Gnss World of China · 2013
In order to realize digital-to-analog conversion of the high speed GNSS satellite signal simulator,this paper based the high-speed digital-to-analog converter AD9779A completes the design.FFPGA control the AD9779A to achieve the IF-source digital-to-analog conversion,including up-conversion function,which achieve conversion the 10 MHz base band digital navigation signal to 210 MHz mid-frequency analog signal.This design to meet the RF module inputs requirements,simplified previously used in the design of interpolation based on digital-analog conversion,so that the circuit design is more simple,easy integration and modularization.