| DDS中相位截断效应分析及其改善方法 |
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| 引用本文： | 刘铁新,高俊法.DDS中相位截断效应分析及其改善方法[J].宇航计测技术,1999,19(4):11-16. |
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| 作者姓名： | 刘铁新 高俊法 |
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| 作者单位： | 中国科学院陕西天文台 |
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| 摘 要： | 分析了在直接数字频率合成（ＤＤＳ）中引起杂散的相位截断效应，针对其引起的杂散特点讨论了一种通过加入伪随机数改善杂散谱分布的方法，并通过计算机仿真进行了验证。
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| 关 键 词： | ＋相位截断 伪噪声 频率合成技术 计算机模拟 |
An analysis of the output signals and a method to reduce the spurious phase accumulator truncation in DDS |
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| Liu Tiexin, Gao Junfa.An analysis of the output signals and a method to reduce the spurious phase accumulator truncation in DDS[J].Journal of Astronautic Metrology and Measurement,1999,19(4):11-16. |
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| Authors: | Liu Tiexin Gao Junfa |
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| Institution: | Liu Tiexin; Gao Junfa |
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| Abstract: | Spurious noise is one of problems in DDS, which has been researched in recent years.The paper analyses the signals as a result of the phase accumulator truncation. Then a method consistingof adding a sequence of pseudo-random numbers to convert the discrete line spurs into a continuous noisefloor is discussed. A computer program is created to verify this method. |
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| Keywords: | Phase accumulator truncation Pseudonoise Frequency synthesis technigueComputerized simulation |
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