| 一种基于微元法和分数阶傅里叶变换的VCO非线性度检测方法 |
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| 引用本文： | 徐宝松,涂亚庆,刘良兵.一种基于微元法和分数阶傅里叶变换的VCO非线性度检测方法[J].电子测量与仪器学报,2008,22(5). |
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| 作者姓名： | 徐宝松 涂亚庆 刘良兵 |
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| 作者单位： | 后勤工程学院信息工程系,重庆,400016 |
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| 摘 要： | 非线性度校正技术是实现高精度压控振荡器(VCO)以及高分辨率线性调频连续波雷达的关键技术之一.其中,非线性度的检测精度直接决定了非线性度校正精度.提出了一种基于微元法和分数阶傅里叶变换的VCO非线性度检测新方法.该方法结合一维搜索和离散时间傅里叶变换,检测信号频率及频率变化率,并利用起点预测算法提高其运算速度.仿真结果表明,与基于Wigner-Ville分布的方法相比,该方法能更有效地检测VCO的非线性度.
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| 关 键 词： | 压控振荡器 非线性度 微元法 分数阶傅里叶变换 起点预测算法 |
VCO Nonlinearity Detection Method Based on Element Analytic and FRFT |
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| Xu Baosong,Tu Yaqing,Liu Liangbing.VCO Nonlinearity Detection Method Based on Element Analytic and FRFT[J].Journal of Electronic Measurement and Instrument,2008,22(5). |
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| Authors: | Xu Baosong Tu Yaqing Liu Liangbing |
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| Affiliation: | Xu Baosong Tu Yaqing Liu Liangbing(Department of Information Engineering,Logistical Engineering University,Chongqing 400016,China) |
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| Abstract: | Linearity correction is a key technique for high-precision VCOs and high-resolution LFMCW radars. The accuracy of linearity correction is directly determined by the precision of nonlinearity detection results. A novel method for VCO nonlinearity detection is proposed, which is based on element analytic and FRFT, and combines one dimension search and DTFT. Both frequency and frequency variation are detected. Furthermore, the initial search point algorithm is used to improve the calculation efficiency. Simula... |
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| Keywords: | VCO nonlinearity element analytic fraction Fourier transform initial search point prediction |
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