| 摘要: |
| 介绍了一种基于AD9954和AD8349的宽带线性调频信号源的设计。通过正交调制上下边带互换原理,信号的带宽可拓展为原来的2倍,实现宽带信号源。另外,还提出了一种利用DDS的可编程特性对信号的相位进行分段补偿从而获得高边带抑制比的方法。 |
| 关键词: 雷达信号处理,宽带线性调频信号源,直接数字频率合成器 |
| DOI：10.3969/j.issn.1001-893X. |
| Revised:July 31, 2007 |
| 基金项目: |
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| Design of a Wide Band LFM Signal Generator Based on AD9954 and AD8349 |
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| Abstract: |
| This paper introduces the design of a wide band LFM signal generator based on AD9954 and AD8349.Through the principle of I/Q quadrature up-converter(down-converter),the band of the signal will be doubled and a wide band signal generator is designed.In addition,a method of phase compensation in subsection with the programmable feature of DDS is proposed in order to get good subside suppression. |
| Key words: radar signal processing,wide band LFM signal generator,DDS |
