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 |
(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 |
(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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