| 引用本文: | 刘朝军,许人灿,陈曾平.DDS输出信号频谱结构的系统分析.[J].国防科技大学学报,2005,27(6):53-56.[点击复制] |
| LIU Chaojun,XU Rencan,CHEN Zengping.The Systematic Analysis of the Spectrum Structure of DDS Signal[J].Journal of National University of Defense Technology,2005,27(6):53-56[点击复制] |
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| DDS输出信号频谱结构的系统分析 |
| 刘朝军, 许人灿, 陈曾平 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 首先介绍了直接数字合成(DDS)技术的基本原理和理想情况下DDS的输出信号频谱结构，然后分析了工程实际中DDS的误差信号来源，从信号与系统理论的角度解释了相位截断和幅度量化引起的DDS输出信号频谱的杂散，并在最后对D/A的非理想特性和参考时钟相位噪声的影响作了简要的说明。 |
| 关键词: DDS 背景杂散 相位截断 |
| DOI： |
| 投稿日期：2005-08-15 |
| 基金项目:国家863基金资助项目(2002AA731130) |
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| The Systematic Analysis of the Spectrum Structure of DDS Signal |
| LIU Chaojun, XU Rencan, CHEN Zengping |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073,China)
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| Abstract: |
| The fundamental theory of direct digital synthesizer(DDS) and the spectrum of the output signal under the ideal conditions are introduced firstly. Then the error signal in engineering is analyzed. The output signal background spurious brought about by phase truncation and digital amplitude are explained from the angle of the theory of signal and system, and in the end the effects of D/A's none ideal characteristics and the clock's phase noise are expounded. |
| Keywords: DDS background spurious phase truncation |
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