| 基于正弦分段线性近似算法的DDS频谱分析 |
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| 引用本文： | 谭亚军,郑瑞锋,陆安江,杨健. 基于正弦分段线性近似算法的DDS频谱分析[J]. 贵州大学学报(自然科学版), 2010, 27(2): 66-69 |
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| 作者姓名： | 谭亚军 郑瑞锋 陆安江 杨健 |
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| 作者单位： | 贵州大学理学院电子科学系,贵州,贵阳,520025;贵州省微纳电子与软件技术重点实验室,贵州,贵阳,520025 |
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| 基金项目： | 贵州省中药现代化专项项目 |
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| 摘 要： | 直接数字频率合成技术在数字通信系统中被广泛采用..但是DDS本身的结构决定了其输出信号中存在无法消除的杂波,采用严格的数学方法分析了基于分段线性近似DDS中的频谱。得到DDS输出信号的时域和频域数学表达式,为精确计算DDS的杂散抑制度提供了方便。并作出八分段近似DDS的误差分析和频谱图。
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| 关 键 词： | 分段线性近似 频谱分析 无噪声动态范围 |
Spectrum Analysis of DDS Based on Sinusoidal Piecewise Linear Approximation Algorithm |
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| TAN Ya-jun,ZHENG Rui-feng,LU AN-jiang,YANG Jian. Spectrum Analysis of DDS Based on Sinusoidal Piecewise Linear Approximation Algorithm[J]. Journal of Guizhou University(Natural Science), 2010, 27(2): 66-69 |
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| Authors: | TAN Ya-jun ZHENG Rui-feng LU AN-jiang YANG Jian |
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| Affiliation: | ,LU AN-jiang(1.Department of Electronics and Science,College of Science,Guizhou University,Guiyang 550025,China;2.Micro-nano Electronics and Software Technology Key Laboratory of Guizhou Province,Guiyang 550025,China) |
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| Abstract: | Direct digital synthesizer technology is widely applied in digital communication system.But the spurious spectrum caused by phase truncation affects the quality of output signal greatly.Based on the mathematical deduction,the time-domain expression and the spectrum expression of direct digital synthesizer＇s output signal were proposed.They make it convenient to calculate the spurious spectrum accurately.more error analysis and frequency spectrum of DDS are given based on Sinusoidal eight piecewise linear approximation algorithm. |
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| Keywords: | direct piecewise linear approximation spectrum analysis SFDR |
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