| DDS时域参数分析及优化研究 |
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| 引用本文： | 宋跃,张小平,周明辉.DDS时域参数分析及优化研究[J].电子测量与仪器学报,2006,20(1):60-63. |
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| 作者姓名： | 宋跃 张小平 周明辉 |
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| 作者单位： | 1. 东莞理工学院电子工程系,广东,东莞,523808;湖南科技大学信息与电气工程学院,湖南,湘潭,411201
2. 湖南科技大学信息与电气工程学院,湖南,湘潭,411201 |
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| 基金项目： | 本项目为湖南省自然科学基金项目（编号：02JJY5011）、省科技攻关资助项目（编号：03GKY3046）及省教育厅重点资助项目（编号：02A051）. |
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| 摘 要： | DDS直接数字合成时，由于相位截断、非均匀采样而造成波形重构时时域参数如频率、周期、占空比的误差，特别在频率很低、频率较高时尤为突出。本文从DDS的基本原理和通用电路出发，对时域参数进行了数学模型构造和理论分析，提出了时域参数微观与宏观效应的概念，得出了误差结论与特性，找到了优化时域精度的有效途径和方法，理论研究和仿真与实验结果完全吻合。
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| 关 键 词： | DDS 非均匀采样 相位截断 时域参数误差与优化 |
| 收稿时间： | 2004-04 |
| 修稿时间： | 2004-04 |
Analysis of Time Domain Parameters on DDS and Optimization Research |
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| Song Yue,Zhang Xiaoping,Zhou Minghui.Analysis of Time Domain Parameters on DDS and Optimization Research[J].Journal of Electronic Measurement and Instrument,2006,20(1):60-63. |
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| Authors: | Song Yue Zhang Xiaoping Zhou Minghui |
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| Affiliation: | 1. Deparmaent of Electrical Engineering, Dongguan University of Technology, Guangdong Dongguan, 523808; 2. College of Electrical and Information Engineering, Hunan University of Science and Technology, Hunan Xiangtan, 411201, China |
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| Abstract: | When the wave is reconstructed by Direct Digital Synthesis, the error of time - domain parameters such as frequency, cycle, pulse duration ratio would been preduced because of phase truncation and nonuniform sample, especially in the case of low and high frequency. In terms of fundamental principles and common circuitry of DDS, the mathematical model was constructed, theoretic analysis was carried through for time-domain parameters in the article, microcosmic and macroscopical effect were put forward, the error conclusion and property were got, the way of optimizing the time domain precision was found, the theoretic study was in accord with simulation and experiment result. |
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| Keywords: | DDS nonuniform sample phase truncation error and optimizing of time domain parameters |
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