| 直接数字式频率合成器的杂波抑制度分析 |
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| 引用本文： | 唐东峰,黄丹,李涛.直接数字式频率合成器的杂波抑制度分析[J].通信技术,2002(11):25-26. |
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| 作者姓名： | 唐东峰 黄丹 李涛 |
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| 作者单位： | 湘潭工学院信息与电气工程系,湘潭,411201 |
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| 摘 要： | 着重研究了直接数字式频率合成器(DDS)的频谱特性。以信号的数学模型和频谱为出发点,归纳出DDS在有相位截断时信号的杂波抑制度的计算,并得到杂波抑制度与频率控制字、截断误差、D/A位数的关系,为研制低杂散DDS提供一定的理论依据。
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| 关 键 词： | 频率合成器 频率控制字 截断误差 杂波抑制度 |
| 修稿时间： | 2002年6月17日 |
Interference Wave Restraint Analysis of the Direct Digital Frequency Synthesizer |
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| Tang Dongfeng Huang Dan Li Tao.Interference Wave Restraint Analysis of the Direct Digital Frequency Synthesizer[J].Communications Technology,2002(11):25-26. |
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| Authors: | Tang Dongfeng Huang Dan Li Tao |
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| Abstract: | The spectrumcharacteristic of the direct digital frequency synthesize r(DDS )is mainly stud-ied in this paper.On the basis of math ematic model and spectrum analysis,the calculation formula of inter-ference wave restraint is deduced,meanwhile the phase error sequence of DDS is introduced,finally the rela-tion among the frequency controllin g word,the spurious level phase accu mulation byte,interrupting error byte and D /A byte is obtained,which s erves as theoretical basis for studying the low spurious DDS. |
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| Keywords: | frequency synthesizer frequency c ontrolling word interrupting erro r interference wave restranint |
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