| 引用本文: | 宿绍莹,侯庆凯,陈曾平.一种非均匀采样的宽带雷达数字正交解调方法.[J].国防科技大学学报,2010,32(6):32-36.[点击复制] |
| SU Shaoying,HOU Qingkai,CHEN Zengping.Digital Quadrature Demodulation of Wideband Radar Based on Nonuniform-sampling[J].Journal of National University of Defense Technology,2010,32(6):32-36[点击复制] |
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| 一种非均匀采样的宽带雷达数字正交解调方法 |
| 宿绍莹, 侯庆凯, 陈曾平 |
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(国防科技大学 ATR重点实验室，湖南 长沙 410073)
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| 摘要: |
| 数字正交解调是宽带雷达数字接收机的重要组成部分，灵活性和实时性是数字正交解调设计的关键问题。从二阶采样和多相滤波的原理出发，提出了基于非均匀采样的数字正交解调方法，给出了算法的实现结构，并通过仿真验证了算法的正确性。通过与低通滤波法、多相滤波法比较结果表明，基于非均匀采样的数字正交解调方法具有优化的实现结构和更好的实时性，可以用于宽带雷达数字接收机的设计。 |
| 关键词: 非均匀采样 正交解调 宽带雷达 数字接收机 多相滤波 |
| DOI： |
| 投稿日期：2010-07-03 |
| 基金项目:国家部委资助项目(51307060401) |
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| Digital Quadrature Demodulation of Wideband Radar Based on Nonuniform-sampling |
| SU Shaoying, HOU Qingkai, CHEN Zengping |
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(ATR Key Laboratory， Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Flexibility and simplicity are key points in designing a digital quadrature demodulator, which is an important part of wideband radar digital receiver. In this paper, we proposed a new implementation of digital quadrature demodulation based on nonuniform-sampling, which is evolved from second-order sampling and multiphase filter. The structure of nonuniform-sampling was presented, and its effectiveness was verified by simulation results. Compared with low-pass filter and multiphase filter, nonuniform-sampling obtains more optimized structure and better performance in real-time processing. This novel approach will offer potential for better resolution in designing a wideband radar digital receiver. |
| Keywords: nonuniform-sampling quadrature demodulation wideband radar digital receiver multiphase filter |
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