| 宽带雷达中频直接采样信号数字去线性调频方法 |
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| 引用本文： | 林钱强,张月,唐鹏飞,陈曾平. 宽带雷达中频直接采样信号数字去线性调频方法[J]. 宇航学报, 2013, 34(3): 402-409. DOI: 10.3873/j.issn.1000-1328.2013.03.016 |
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| 作者姓名： | 林钱强 张月 唐鹏飞 陈曾平 |
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| 作者单位： | 国防科技大学ATR重点实验室，长沙 410073 |
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| 基金项目： | 国家自然科学基金重点资助项目，装备预先研究项目 |
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| 摘 要： | 为了改善模拟Dechirp方法的接收信号质量，降低中频直接采样匹配滤波处理的运算量，结合这两种方法的优点提出了数字Dechirp实时处理方法。通过理论分析与推导得出数学模型，再从实现的角度详细分析了数据抽取、滤波器设计等问题，同时介绍了适用于数字Dechirp的系统失真补偿方法。仿真与实测数据证明该方法是一种可行、高效的实时脉冲压缩方法。
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| 关 键 词： | 中频直接采样 脉冲压缩 数字去线性调频 匹配滤波 数据抽取 |
| 收稿时间： | 2012-09-06 |
Digital Dechirp Method Based on Wideband Radar Direct IF Sampling |
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| LIN Qian-qiang , ZHANG Yue , TANG Peng-fei , CHEN Zeng-ping. Digital Dechirp Method Based on Wideband Radar Direct IF Sampling[J]. Journal of Astronautics, 2013, 34(3): 402-409. DOI: 10.3873/j.issn.1000-1328.2013.03.016 |
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| Authors: | LIN Qian-qiang ZHANG Yue TANG Peng-fei CHEN Zeng-ping |
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| Affiliation: | ATR Key Lab，National University of Defense Technology，Changsha 410073，China |
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| Abstract: | In order to improve the quality of the signal obtained by analog Dechirp method and reduce the computation load of matched filtering after direct IF (Intermediate frequency) sampling, a digital Dechirp method combing the benefits of these two methods is proposed in this paper. By theoretical analysis, the mathematical model is obtained, and the data decimation and the filter design are also analyzed in detail for the realization of method provided in this paper. Compensation approach for the system distortion is also proposed. Simulation and analysis based on measured data prove the effectiveness and efficiency of the proposed strategy. |
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| Keywords: | Direct intermediate frequency sampling Pulse compression Digital Dechirp Matched filtering Data decimation |
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