Analysis of DDS Sampling Method and Harmonic Composition

Through theoretical proof and algorithm design, this paper numerically demonstrates that the three samplingmethods of DDS are equivalent in amplitude-frequency characteristics. Depending on theoretical analysis, thearticle obtains the conclusion that 2 points are optimal when sampling at 2, 3, and 4 points. Built on the dataresults, this paper obtains the fractional form of the amplitude and phase of the DDS sampled signal; in addition,this paper also obtains the design parameters of the DDS post-stage filter. It also gives a control method for thecalculation error when addressing this issue. KCI Citation Count: 0