| 直接数字chirp合成及频谱分析 |
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| 引用本文： | 岳彦生,龙腾.直接数字chirp合成及频谱分析[J].系统工程与电子技术,2001,23(4):13-15. |
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| 作者姓名： | 岳彦生 龙腾 |
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| 作者单位： | 北京理工大学电子工程系, |
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| 摘 要： | 介绍了直接数字chirp合成的原理，采用信号分析的方法首次详细推导了存在相位截断时采用直接数字合成技术产生chirp信号的频谱，得出了存在相位截断时所合成的chirp信号的频谱的数学表达式，同时分析了DAC的量化和非理想性对合成的线性调频脉冲信号频谱的影响，最后给出了仿真分析的结果。
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| 关 键 词： | 线性调频 频谱分析 数学信号 |
| 文章编号： | 1001-506X(2001)04-0013-03 |
| 修稿时间： | 2000年4月3日 |
Direct Digital Chirp
Synthesis and Spectrum Analysis |
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| Yue Yansheng,Long Teng.Direct Digital Chirp
Synthesis and Spectrum Analysis[J].System Engineering and Electronics,2001,23(4):13-15. |
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| Authors: | Yue Yansheng Long Teng |
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| Abstract: | In this paper, the principle of direct digital chirp synthesis (DDCS) is introduced. Then, based on signal analysis methods, the spectrum of synthesized chirp signal is deduced in detail for the first time when there is phase truncation in DDCS. And the expression of spectrum of a DDCS is derived. The impact of amplitude quantifying error and non-ideal characteristic of DAC on spectrum performance of a DDCS is analyzed also. At the end of the paper, the emulated result is presented. |
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| Keywords: | Linear frequency modulation Spectrum analysis Digital signal |
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