| 一种基于最佳平方逼近算法的数字频率综合器 |
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| 引用本文： | 邓青,吴建辉,姜爱鹏.一种基于最佳平方逼近算法的数字频率综合器[J].固体电子学研究与进展,2006,26(4):522-526. |
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| 作者姓名： | 邓青 吴建辉 姜爱鹏 |
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| 作者单位： | 东南大学国家专用集成电路系统技术研究中心,南京,210096 |
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| 摘 要： | 提出一种基于最佳平方逼近算法的数字频率综合器的设计方法,同时采用非均匀分段纠正误差方式对输出正余弦波形进行优化。通过MATLAB系统仿真分析结果表明,采用这种新方法设计的数字频率综合器性能具有精度高、误差小和结构简单的优点,最差情况下的无杂散动态范围(SFDR)小于-80dBc。
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| 关 键 词： | 数字频率综合器 无杂散动态范围 最佳平方逼近 |
| 文章编号： | 1000-3819（2006）04-522-05 |
| 收稿时间： | 2004-11-16 |
| 修稿时间： | 2005-02-21 |
Design of a Direct Digital Frequency Synthesizer Based on Least Square Approximation |
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| DENG Qing,WU Jianhui,JIANG Aipeng.Design of a Direct Digital Frequency Synthesizer Based on Least Square Approximation[J].Research & Progress of Solid State Electronics,2006,26(4):522-526. |
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| Authors: | DENG Qing WU Jianhui JIANG Aipeng |
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| Abstract: | This paper presents a direct digital frequency synthesizer(DDFS) based on Least Square(LS) approximation. An approach of correcting error with unequal interval is also applied to optimize sine-cosine wave to make SFDR in worst situation be less than -80 dBc. Compared with the DDFS based on looking up table and other approximation approach, the implementation has the advantages of high precision, low error and simple structure. |
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| Keywords: | direct digital frequency synthesizer(DDFS) SFDR least square approximation |
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