| 摘要: |
| 结合软件无线电的窄带中频采样数字化的基本模型，提出了一种基于数字下变频器AD6620的中频信号滤波器的设计方案，并详细讨论了一种提高系统信噪比的具体方法，给出了AD6620的CIC5和RCF滤波器频域响应的仿真结果。 |
| 关键词: 短波接收机 软件无线电 中频滤波器 数字下变频器 高速采样 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:August 21, 2005Revised:January 14, 2006 |
| 基金项目:解放军总参某部反术攀登基金 |
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| Design of an AD6620-based IF Filter |
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| Abstract: |
| According to the basic mode of Software Defined Radio(SDR) narrowband IF sampling digitalization,a solution of AD6620-based IF signal filter system is provided.A method for improving the system SNR is discussed,and simulation results of AD6620 CIC5 filter and RCF filter frequency response are given. |
| Key words: HF receiver,software defined radio(SDR),IF filter,digital down converter,high-speed sample, |
