Design of A Intermediate Frequency Data Acquisition System
Teng Long · Journal of Projectiles.Rockets.Missiles and Guidance · 2005
Wide band and Intermediate frequency of DDC is significant in Radar system.The dissertation focuses on the low pass filter which is base on FPGA and explains the causes of output spurious frequency of NCO as well as the relationship among them.Besides,it describes a kind of realization of improved FIR filter aiming at FPGA.Finally,it presents a scheme of median frequency sampling,which reaches the sampling rate of 105M and sampling precision of 14 bits.