Timing Analysis and Research of Direct Digital Frequency Modulation
Ma Qingqing · Modern Electronics Technique · 2007
A DDFM modulator can be used for providing the modulated signal with high quality.But the performance of the modulated signal is affected by the relation between the sampling frequency of modulating signal(f_s) and the clock frequency of DDS(f_(clk)).This paper based on the theory of DDFM,analyses the effect to the modulated signal when f_s and f_(clk) are in different relationship and some problems to be considered in practice,and gives the emulational result also.