| 相位舍位对DDS谱分布的影响 |
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| 引用本文： | 张玉兴,彭清泉.相位舍位对DDS谱分布的影响[J].电子科技大学学报(社会科学版),1997(2). |
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| 作者姓名： | 张玉兴 彭清泉 |
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| 作者单位： | 电子科技大学电子工程系 |
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| 摘 要： | 采用严格的信号分析方法，运用离散傅里叶变换（ＤＦＴ）和傅里叶变换（ＦＴ）详细推导了理想状态和相位舍位条件下直接数字频率合成器（ＤＤＳ）的频谱分布规律。所得到的理论推算结果与目前公认的结果一致，这对实际的ＤＤＳ系统设计有着极大的参考价值
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| 关 键 词： | 直接数字频率合成器 相位累加器 相位舍位 离散傅里叶变换 傅里叶变换 |
Effect on Output Spectrum of DDS in Presence of Phase Truncation |
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| Zhang Yuxin,Peng Qingquan.Effect on Output Spectrum of DDS in Presence of Phase Truncation[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),1997(2). |
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| Authors: | Zhang Yuxin Peng Qingquan |
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| Abstract: | Based on rigious signal analysis,some spectrum expressions of direct digital synthesizer (DDS) are presented by employing discrete Fourier transform (DFT) and Fourier transform (FT) in this paper.First,the output characteristics of DDS with ideal parameters are discussed.Then,the distribution and amplitude of output spectrum of DDS are provided in the presence of phase accumulator truncation in details.The deduced results are quite in agreement with general recognized ones.The conclusion is useful for real DDS System design. |
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| Keywords: | direct digital synthesizer phase accumulator phase truncation discrete Fourier transform Fourier transform |
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