| 基于DDS雷达数字接收机的设计及其关键技术 |
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| 引用本文： | 高玉良,王冰切,何明浩.基于DDS雷达数字接收机的设计及其关键技术[J].现代雷达,2001,23(5):50-52. |
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| 作者姓名： | 高玉良 王冰切 何明浩 |
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| 作者单位： | 1. 空军雷达学院微波工程系
2. 空军雷达学院微波工程系;清华大学自动化系 |
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| 摘 要： | 采用DDS与高精度测频技术来实现AFC,采用由DDS实现的相参采样时钟电路和中频正交直接采样电路构成正交双通道接收机,有效消除或减少了频率漂移等各种不稳定因素和模拟实现时各种因素对系统性能的影响,大大提高了整机性能.
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| 关 键 词： | 直接数字频率合成 自动频率跟踪 相参时钟 中频正交采样 |
| 修稿时间： | 2000年12月18 |
Design and Key Technologies of Radar Digital Receiver Based on DDS |
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| GAO Yu liang,WANG Bing qie,HE Ming hao.Design and Key Technologies of Radar Digital Receiver Based on DDS[J].Modern Radar,2001,23(5):50-52. |
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| Authors: | GAO Yu liang WANG Bing qie HE Ming hao |
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| Abstract: | In this paper, AFC is realized with technologies of DDS and high accuracy frequency measurement,quadrature double channel receiver is made up of circuits of IF quadrature sampling directly and coherent sampling clock realized with DDS.The effect of a11 kinds of unstable factors such as frequency shift and the limits placed by analogy circuit is diminished effectively, even eliminated.Meanwhile,the performance of the receiver is improved greatly, for example,the limits on I(improvement factor) and SCV(visibility) placed by traditional receiver are exceeded.Additionally,some practical problems in realizing are discussed. |
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| Keywords: | DDS AFC(automatic frequency control) coherent clock IF quadrature sampling |
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