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清华大学学报(自然科学版)  2015, Vol. 55 Issue (8): 878-883    
  电子工程 本期目录 | 过刊浏览 | 高级检索 |
雷达目标双曲线调频回波生成
周伟1, 叶春茂2, 金侃1, 鲁耀兵2, 杨健1
1. 清华大学 电子工程系, 北京 100084;
2. 北京无线电测量研究所, 北京 100854
Radar echo generation for hyperbolic frequency-modulation waveforms
ZHOU Wei1, YE Chunmao2, JIN Kan1, LU Yaobin2, YANG Jian1
1. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;
2. Beijing Institute of Radio Measurement, Beijing 100854, China
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摘要 由于双曲线调频(hyperbolic frequency-modulation, HFM)信号具备良好的Doppler不变性, 比线性调频信号更有利于高速运动目标的探测和成像。但是对于复杂电大尺寸目标, 直接采用高频电磁散射理论生成宽带回波计算量非常庞大。为研究HFM信号在宽带雷达成像中的应用, 该文提出一种利用目标静态电磁计算数据的HFM信号回波快速生成方法, 通过相位匹配滤波和频域降采样有效地降低了计算复杂度, 并详细分析了目标高速运动对HFM信号匹配滤波的影响。该方法同时适用于线性调频信号的宽带回波仿真。仿真结果验证了该方法的正确性和有效性。
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周伟
叶春茂
金侃
鲁耀兵
杨健
关键词 宽带回波生成双曲线调频高速运动目标匹配滤波    
Abstract:The hyperbolic frequency-modulation (HFM) waveform is more conducive to high speed moving target detection and imaging than the commonly used linear frequency-modulation (LFM) waveform, due to its inherent Doppler-invariant property. However, the generation of radar echoes is computationally intensive when using high frequency algorithms for complex electrically large targets. A fast method was developed for generating HFM radar echoes using static electromagnetic data for HFM waveforms in wideband radar imaging with the computational complexity effectively reduced by phase-matched filtering and frequency domain down-sampling. The result is used to study the influence to HFM signal matched filtering for high-speed movements. This method is also suitable for LFM waveforms. Simulations verify the accuracy and effectiveness of this method.
Key wordswideband echo generation    hyperbolic frequency-modulation    high speed targets    matched filtering
收稿日期: 2014-06-10      出版日期: 2015-09-30
ZTFLH:  TN957.52  
通讯作者: 杨健,教授,E-mail:yangjian_ee@tsinghua.edu.cn     E-mail: yangjian_ee@tsinghua.edu.cn
引用本文:   
周伟, 叶春茂, 金侃, 鲁耀兵, 杨健. 雷达目标双曲线调频回波生成[J]. 清华大学学报(自然科学版), 2015, 55(8): 878-883.
ZHOU Wei, YE Chunmao, JIN Kan, LU Yaobin, YANG Jian. Radar echo generation for hyperbolic frequency-modulation waveforms. Journal of Tsinghua University(Science and Technology), 2015, 55(8): 878-883.
链接本文:  
http://jst.tsinghuajournals.com/CN/  或          http://jst.tsinghuajournals.com/CN/Y2015/V55/I8/878
  图1 HFM 信号特性
  图2 回波快速生成流程图
  图3 仿真目标模型和静态高分辨一维距离像
  图4 HFM 和LFM 信号仿真结果对比
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