| 过采样及抖动注入对数字产生LFM信号谱质的改善 |
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| 引用本文： | 李衍忠,薛巍,蔡英杰,向敬成. 过采样及抖动注入对数字产生LFM信号谱质的改善[J]. 信号处理, 2000, 16(4): 344-348 |
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| 作者姓名： | 李衍忠 薛巍 蔡英杰 向敬成 |
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| 作者单位： | 电子科技大学电子工程学院 |
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| 摘 要： | 本文分析了直接数字波形合成DDWS中的量化噪声及其与过采样的等效关系，介绍了噪声抖动注入技术对信号中杂散成分的抑制作用。给出了DDWS方式数字产生LFM信号中注入噪声抖动的仿真分析数据。结果表明，具有高采样率、低量化位数的DDWS，采用噪声抖动注入技术可以得到谱质较好的LFM信号，据此可以开发廉价实用的LFM信号源。
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| 关 键 词： | 量化误差 过采样 抖动注入 杂散抑制 线性调频 |
LFM Signal Spectrum Quality Improvement by Oversampling and Dither Injection in DDWS |
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| Li Yanzhong,Xue Wei,Cai Yingjie,Xiang Jingcheng. LFM Signal Spectrum Quality Improvement by Oversampling and Dither Injection in DDWS[J]. Signal Processing(China), 2000, 16(4): 344-348 |
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| Authors: | Li Yanzhong Xue Wei Cai Yingjie Xiang Jingcheng |
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| Affiliation: | Li Yanzhong,Xue Wei,Cai Yingjie,Xiang Jingcheng;(college of Electronic Engineering Uni. Of Electronic Science and Technology) |
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| Abstract: | This paper analyzer the roles played by quantization and oversampling, introduces the dither injec tion techniques to reduce spurious signals in DDWS. The simulation~ results of dithered digital LFM signals thow that a practical LFM signal generator can ie be designed using high-speed and low quantization DAC bits. |
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| Keywords: | Quantization Error Oversampling Dither Injection Spur Reduction LFM |
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