| 实用D/A变换器引起的信号抖动分析 |
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| 引用本文： | 王莹.实用D/A变换器引起的信号抖动分析[J].国防科技大学学报,1999,21(3):67-70. |
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| 作者姓名： | 王莹 |
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| 作者单位： | 国防科技大学电子工程学院 |
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| 摘 要： | 本文针对模拟信号数字化处理后，其信号会出现抖动这一实际现象，进行了深入的理论分析和计算，指出产生抖动的主要原因是数字离散信号在Ｄ／Ａ变换器滤波后残留了部分高频分量。本文推导了残留高频分量引起幅度抖动和相位抖动的表达式，分析了影响幅、相抖动的主要因素，并提出了减小抖动的措施。本文得出的结论对数字化系统设计，具有实际指导意义。
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| 关 键 词： | 数字信号处理，数／模变换，模／数变换，相位抖动 |
| 收稿时间： | 1998/7/22 0:00:00 |
The Analysis of Signal Shaking Caused by Real D/A Transformer |
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| Wang Ying.The Analysis of Signal Shaking Caused by Real D/A Transformer[J].Journal of National University of Defense Technology,1999,21(3):67-70. |
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| Authors: | Wang Ying |
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| Institution: | Institute of Electronic Engineering, NUDT, Changsha, 410073 |
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| Abstract: | This paper presents and analyses a practical phenomenon that digital processing of analogous signal brings about shaking. The cause of shaking is that some high_freguences are left over signal behind the D/A transformation filter. The formulas of amplitude shaking and phase shaking are derived. The factors which have an effect on the amplitude shaking and phase shaking are analyzed. The method to reduce shaking is given in this paper. The conclusion is of significance for designing a system of digital processing. |
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| Keywords: | digital signal processing D/A transformation phase shaking |
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