| 一种新颖的基于低通控制特性的AFC系统 |
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| 引用本文： | 郑生华,王冰,弋稳. 一种新颖的基于低通控制特性的AFC系统[J]. 现代雷达, 2001, 23(6): 55-56 |
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| 作者姓名： | 郑生华 王冰 弋稳 |
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| 作者单位： | 华东电子工程研究所, |
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| 摘 要： | 提出了一种新颖的基于低通滤波控制特性的AFC系统,使用低通滤波器的过渡带代替传统的中频鉴频器的鉴频特性曲线,将由于各种因素造成发射机频率不稳的频率偏差转化为符号函数,结合DDS技术,从而形成一种宽频率跟踪范围的AFC系统.
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| 关 键 词： | 雷达接收机 低通滤波器 自动频率控制 直接数字频率合成 |
| 修稿时间： | 2001-03-08 |
A Novel AFC System Based on Low-Pass Filter |
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| ZHENG Shen hua WANG Bing YI Wen. A Novel AFC System Based on Low-Pass Filter[J]. Modern Radar, 2001, 23(6): 55-56 |
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| Authors: | ZHENG Shen hua WANG Bing YI Wen |
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| Affiliation: | East China Research Institute of Electronic Engineering Hefei 230031 |
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| Abstract: | A novel AFC system based on the control performance of a low pass filter is presented in this paper. The transition band of the low pass filter is used instead of the characteristic curve of an IF frequency discriminator. The frequency deviation of the transmitter due to various causes is converted into a sign function. These together with the DDS technique are used to form an AFC system with a wide frequency tracking range. |
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| Keywords: | radar receiver low pass filter automatic frequency control (AFC) direct digital synthesis (DDS) |
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