| 摘要: |
| 通过建立A/D、D/A的数学模型,推导了A/D、D/A实现变频的基本公式,分析了量化噪声和变频损失,总结了其主要特点及其与模拟混频器的区别,说明A/D和D/A实现频率变换是切实可行的,在进行模数、数模转换的同时实现变频,有利于节省器件,简化电路。 |
| 关键词: 通信系统,信号处理,模数转换,频率变换 |
| DOI：10.3969/j.issn.1001-893X. |
| Revised:July 22, 2003 |
| 基金项目: |
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| Technological Analysis of Realizing Frequency Conversion with A/D and D/A |
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| Abstract: |
| Through establishing mathematic model of A/D and D/A, this paper deduces the basic expressions of realizing frequency conversion with A/D and D/A, analyses the quantizing noise and conversion loss, and summarizes the difference between it and analog frequency conversion?While realizing frequency conversion, it can realize A/D conversion,D/A conversion ,and can save component and simplify circuit. |
| Key words: Communication system,Signal processing,A/D conversion,Frequency conversion, |
