| 欠采样信号频率估计 |
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| 引用本文： | 陶然,单涛,周思永,王越. 欠采样信号频率估计[J]. 兵工学报, 2000, 21(2): 174 |
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| 作者姓名： | 陶然 单涛 周思永 王越 |
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| 作者单位： | 北京理工大学电子工程系,北京,100081 |
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| 摘 要： | 在合成孔径雷达 ( SAR)对运动目标成像和 MTI、MTD雷达探测动目标时 ,都有可能出现频率模糊现象 ,到目前为止 ,还没有快速、有效地解此频率模糊的算法。本文提出了高阶模糊函数 ( HAF)分析欠采样信号的新方法。HAF算法从相位降阶角度出发分析连续调频信号 ,与时频分析法相比 ,大大降低了计算量 ,且放松了边界条件要求。计算机仿真结果验证了该算法的有效性
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| 关 键 词： | 欠采样 频率估计 时频分布 即时频率 |
FREQUENCY ESTIMATION OF UNDERSAMPLED SIGNALS |
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| Tao Ran,Shan Tao,Zhou Siyong,Wang Yue. FREQUENCY ESTIMATION OF UNDERSAMPLED SIGNALS[J]. Acta Armamentarii, 2000, 21(2): 174 |
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| Authors: | Tao Ran Shan Tao Zhou Siyong Wang Yue |
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| Abstract: | The phenomenon of frequency confusion may happen when moving objects are imaged by a synthetic aperture radar(SAR), or are detected by a MTI/ MTD radar. Thus far there does not exist any fast and effective algorithm to solve the problem. A novel method to analyze undersampled signals by high order ambiguity function (HAF ) is here proposed. Compared with the Wigner Ville distribution (WVD) process, the proposed HAF algorithm can decrease computation burden to a great extent and necessitate less strict boundary conditions. |
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| Keywords: | HAF |
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