Research and Implementation of High Speed Remote Sensing Satellites Simulator Signal Source Based on FPGA and DDS Devices
Lei Yang · Dianzi qijian · 2009
A new kind of direct digital synthesizer device is applied in the system of remote sensing satellites simulator signal source.Key technologies and principle of DDS are introduced;A high speed signal source based on FPGA+new DDS devices is designed.It can restrain harmonic spurious effectively.The signal source provides precise and wide range of frequency,which is synthesized by frequency tuning word(FTW) in step sizes no larger than 4 μHz.Finally,some actually signal waves are plesented,which are probed on the output pins of AD9912.