| 离散分数阶Fourier变换的LFM信号时延估计 |
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| 引用本文： | 李昕,王向前.离散分数阶Fourier变换的LFM信号时延估计[J].系统仿真学报,2012,24(4):756-760. |
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| 作者姓名： | 李昕 王向前 |
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| 作者单位： | 1. 安徽理工大学电气与信息工程学院,淮南232001／北京理工人学信息与电子学院,北京100081
2. 安徽理工人学能源与安全学院,淮南,232001 |
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| 基金项目： | 国家自然科学基金(51004004) |
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| 摘 要： | 根据Ozaktas的采样型离散分数阶Fourier变换算法,针对线性调频信号,结合分数阶Fourier变换对线性调频(LFM)信号的独特聚集性,研究了基于Ozaktas离散分数阶Fourier变换的含多普勒的LFM信号时延估计,给出了线性调频体制雷达分数阶Fourier域的目标检测与测距具体实现,并与经典数字脉压对雷达目标测距的分辨力、时延估计误差、运算量进行对比分析,结果验证了基于Ozaktas离散分数阶Fourier变换时延估计的可行性及有效性。
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| 关 键 词： | 时延估计 离散分数阶Fourier变换 LFM信号 雷达目标检测与测距 |
LFM Signal Time-Delay Estimation Based on Discrete Fractional Fourier Transform |
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| LI Xin,WANG Xiang-qian.LFM Signal Time-Delay Estimation Based on Discrete Fractional Fourier Transform[J].Journal of System Simulation,2012,24(4):756-760. |
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| Authors: | LI Xin WANG Xiang-qian |
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| Institution: | 1.College of Electric and Information Engineering,Anhui University of Science and Technology,Anhui 232001,China; 2.College of Energy and Safety,Anhui University of Science and Technology,Anhui 232001,China; 3.School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | In view of linear frequency modulation(LFM) signal,combining with unique aggregation of LFM signal fractional Fourier transform,the time delay estimation of LFM signal with Doppler based on Ozaktas discrete fractional Fourier transforms was studied,and the method of the Chirp radar target detection and ranging in the fractional Fourier domain was given,which compared and analyzed to the classic digital pulse compression from resolution,time delay estimation error and computational.The result proves the time delay estimation based on discrete fractional Fourier transform viable and effective in Chirp radar target detection and ranging. |
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| Keywords: | time-delay estimation discrete fractional Fourier transform LFM signal target detection and ranging of radar |
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