| 摘要: |
| 提出了一种航管应答机的中频数字化设计方案,并详细论述了如何应用带通采样定理、正交相干检波理论实现接收信号的中频直接数字化,同时对高速模拟/数字变换器(ADC)、低通滤波器、基带信号处理等各主要功能模块进行了介绍,并给出了相关的计算和仿真. |
| 关键词: 航管应答机 中频数字化 软件无线电 带通采样 正交相关检波 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:November 21, 2006Revised:March 09, 2007 |
| 基金项目: |
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| IF Digitization Design of an Air Traffic Control Transponder |
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| Abstract: |
| This paper takes an Air Traffic Control(ATC) transponder as an example to discuss how to use band-pass signal sampling theory and coherent quadrature detector theory to convert analog signals to digital signals. Also, it itnroduces some important modules, such as high speed analog to digital convertor(ADC), low-pass filter and base band signal processor, and provides related calculation and simulation. |
| Key words: air traffic control (ATC) transponder,IF digitization,software defined radio(SDR),band-pass signal sampling,coherent quadrature detector |
