An Analysis of DDS Spurious Spectrum Based on Non-uniformly Sampled Model

A non-uniformly sampled model to DDS is introduced, based on which an analysis of DDS phase truncation noise is deduced and some important conclusions including the explanation to this kind of spur noise are derived. Further more, a technique to restrain DDS spur noise is introduced. The Matlab simulation indicates that DDS spur noise can be effectively restrained using this technique under some restriction conditions.