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首先对 2种不同类型的幅度量化杂散信号进行了描述和时域分析 ,然后用离散傅里叶变换法着重对无相位舍位情况下的幅度量化杂散信号进行了频谱仿真 ,得到了一些关于其频谱特征和杂散水平的规律性结论 ,这些结论对DDS的工程应用有重要的指导作用。
Firstly, two different types of amplitude-quantized spurs are described and time-domain analyzed, and then the discrete Fourier transform method is used to perform frequency-domain simulation on amplitude-quantized spurious signals without phase-truncation. With regard to the regularity of their spectral characteristics and spurious levels, these conclusions have important guiding significance for the engineering application of DDS.