| 相位截尾对DDS输出频谱影响的分析与计算 |
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| 引用本文： | 赵正敏.相位截尾对DDS输出频谱影响的分析与计算[J].东南大学学报(自然科学版),2000,30(1):141-145. |
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| 作者姓名： | 赵正敏 |
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| 作者单位： | 淮阴工业专科学校电气工程系,淮阴,223001 |
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| 摘 要： | 采用时域波形分解的方法，分析了相位截尾对DDS输出频谱的影响，给出了相位截尾误差频谱的分布规律，提出一组误差谱的高精度快速算法，并对其作了仿真，波表数据表地址字长较长时，可采用其中的近似算法，较短时则可采用精确算法。
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| 关 键 词： | DDS 相位截尾 误差谱 快速算法 信号分析 |
Analysis and Computation of Output Spectrum of DDS in Presence of Phase-Accumulator Truncation |
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| Zhao Zhengmin.Analysis and Computation of Output Spectrum of DDS in Presence of Phase-Accumulator Truncation[J].Journal of Southeast University(Natural Science Edition),2000,30(1):141-145. |
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| Authors: | Zhao Zhengmin |
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| Institution: | Zhao Zhengmin
(Department of Electrical Engineering,Huaiyin Industrial College,Huaiyin 223001) |
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| Abstract: | The analysis of DDS output spectrum in presence of phase truncation is made with breaking its waveform in timedomain and a fast arithmetic is presented which makes it easy to compute the error spectrum caused by phase truncation, without approximating the phase truncation, the result is accurate for every kind of address width of LUT(Look Up Table) while the approximate arithmetic is fit for the DDS with the wider address LUT. |
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| Keywords: | DDS phase accumulator truncation error spectrum fast spectrum arithmetic |
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