| 摘要: |
| 阐述了数字正交解调的原理以及与传统模拟正交解调相比所体现出的优越性。详细介绍了一种用于信号分析的数字正交解调电路设计方案和工作原理，并结合信号分析类仪器的特点和要求说明电路的硬件和软件设计方法。通过对数字滤波环节的仿真和在具体应用中所得到的实验结果说明设计电路的优越性。 |
| 关键词: 正交解调 数字混频 数字滤波 基带信号 信号分析 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2005-04-11修订日期：2005-07-01 |
| 基金项目:国家预研基金 |
|
| Design of a Digital Quadrature Demodulator for Signal Analysis |
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| () |
| Abstract: |
| The principle and advantage of digital quadrature demodulator is expounded. A designing technique and principle of digital quadrature demodulator for signal analysis is introduced in detail. Based on the characteristic and demand of the instrument for signal analysis, the designing method of hardware and software is described. The simulation of digital filter and the experiment result in the practical application show the advantage of this designing circuit. |
| Key words: quadrature demodulator digital mixer baseband signal signal analysis |
《电讯技术》编辑部 