| 宽带LFM信号的线性度测量 |
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| 引用本文： | 李宏宇,冯克明.宽带LFM信号的线性度测量[J].宇航计测技术,2010,30(3):6-9,48. |
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| 作者姓名： | 李宏宇 冯克明 |
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| 作者单位： | 北京无线电计量测试研究所,北京,100039 |
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| 摘 要： | 介绍了一种采用微波延迟线鉴相的方法对宽带LFM信号的线性度进行测量的装置。在该装置中,使用光纤、电缆实现微波延时,在小波变换的基础上采用相位建模以提高瞬时频率的测频准确度,根据线性调频信号的调频形式建立数学模型,得出了线性度的数学表达式。
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| 关 键 词： | ＋线性调频 线性度测量 小波变换 微波延时线 ＋相位建模 |
The Linearity Measurement of Wideband Linear Frequency Modulated Signal |
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| LI Hong-yu,FENG Ke-ming.The Linearity Measurement of Wideband Linear Frequency Modulated Signal[J].Journal of Astronautic Metrology and Measurement,2010,30(3):6-9,48. |
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| Authors: | LI Hong-yu FENG Ke-ming |
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| Institution: | LI Hong-yu FENG Ke-ming(Beijing Institute of Radio Metrology & Measurement,Beijing 100039) |
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| Abstract: | Linearity measurement is very important to weigh the quality of LFM signal.The paper described an instrument that measuring the linearity of wideband linear frequency modulated signal,with the method of microwave delayline phase detecting.In the instrument,the microwave delayline is realized with optical fiber and coaxial cable,a method of estimating instantaneous frequency is introduced,which is based on wavelet transform and phase modeling to improve precision.And a mathematics model is given according to... |
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| Keywords: | Linear Frequency Modulated(LFM) Linearity measurement Wavelet transform Microwave delayline Phase modeling |
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