| 基于Chirp-Fourier 变换的LFM信号的参数估计 |
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| 引用本文： | 于凤芹,陈光化,曹家麟. 基于Chirp-Fourier 变换的LFM信号的参数估计[J]. 电子测量与仪器学报, 2003, 17(3): 75-79 |
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| 作者姓名： | 于凤芹 陈光化 曹家麟 |
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| 作者单位： | 1. 上海大学机械电子与自动化学院,上海,200072;江南大学通信与控制学院,江苏无锡214036
2. 上海大学机械电子与自动化学院,上海,200072 |
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| 基金项目： | 江苏省自然科学基金，BK2002068， |
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| 摘 要： | 本文从匹配Fourier变换的角度给出了chirp-Fourier变换的定义、意义和离散实现。分析表明，LFM信号的Chirp-Fourier变换的峰值对应的坐标即为其初始频率和调频斜率，所以应用Chip-Fourier变换可以估计LFM信号的参数。仿真试验表明，应用Chirp-Fourier变换不但可以有效地估计LFM信号的参数，而且有很好的抗噪声干扰能力。
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| 关 键 词： | LFM信号 参数估计 匹配Fourier变换 Chirp-Fourier变换 离散Chirp-Fourier变换 线性调频信号 |
| 修稿时间： | 2001-11-01 |
Parameter Estimation of LFM Signal Based on the Chirp-Fourier Transform |
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| Yu Fengqin Chen Guanghua Cao Jialin. Parameter Estimation of LFM Signal Based on the Chirp-Fourier Transform[J]. Journal of Electronic Measurement and Instrument, 2003, 17(3): 75-79 |
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| Authors: | Yu Fengqin Chen Guanghua Cao Jialin |
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| Abstract: | The definition, physical senses and discrete form of Chirp-Fourier transform are discussed from the point of view of match Fourier transform. Analysis results show that the peak of LFM signal Chirp- Fourier transform accords with original frequency and slope of frequency modulation. So the parameters of LFM signals can be estimated using Chirp-Fourier transform. Simulation results have showed that this method is not only of accurate estimation of the parameter, but also good at reducing noisy. |
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| Keywords: | Match Fourier Transform Chirp-Fourier Transformation (CFT) Discrete Chirp-Fourier Transformation (DCFT) LFM signal parameter estimation |
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