| 引用本文: | 李悦丽,周智敏.中频直接采样在 UWB (超宽带)雷达数据采集中的应用研究.[J].国防科技大学学报,1997,19(6):69-75.[点击复制] |
| Li Yueli,Zhou Zhimin.A Study of Direct Sampling of IF Signal on Data Acquisition System in Ultra Wide Band Radar（UWBR)[J].Journal of National University of Defense Technology,1997,19(6):69-75[点击复制] |
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| 中频直接采样在 UWB (超宽带)雷达数据采集中的应用研究 |
| 李悦丽, 周智敏 |
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(国防科技大学 电子工程学院 湖南 长沙 410073)
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| 摘要: |
| 为实现 UWB 雷达中的高速数据采集，本文从理论上探讨了中频/射频直接采样和数字正交技术对大带宽信号（≥1OMHz)进行相干检波的可行性。对三种数字正交途径进行的计算机仿真表明:正交双路的幅相一致性大大提高了，当信号带宽≤20MHz时，镜频抑制效果优于传统模拟方式(<-3OdB)。 |
| 关键词: 中频/射频，直接采样，数字正交技术 |
| DOI： |
| 投稿日期：1997-02-21 |
| 基金项目:国防预研项目 |
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| A Study of Direct Sampling of IF Signal on Data Acquisition System in Ultra Wide Band Radar（UWBR) |
| Li Yueli, Zhou Zhimin |
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(Institule of Electronic Engineering, NUDT Changsha，410073)
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| Abstract: |
| To perform high-speed data acquisition in UWBR，this paper discusses the availability of direct sampling of IF/RF signal and digital quadrature detecting technology on wide-band signal（>=20MHz) demonstrating. Three digital detecting methods are analyzed by computer simulation. The results shows a great improvement on the conformability of phase and magnitude as well as image ratio (IR)，which is less than-30dB in classical detectors. |
| Keywords: IF/RF direct sampling digital quadrature technology |
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