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| 基于高斯短时分数阶傅里叶变换的多分量LFM信号检测与参数估计 | |
| 引用本文： | 李家强, 金荣洪, 耿军平, 范瑜, 毛炜. 基于高斯短时分数阶傅里叶变换的多分量LFM信号检测与参数估计[J]. 电子与信息学报, 2007, 29(3): 570-573. doi: 10.3724/SP.J.1146.2005.00857 |
| 作者姓名： | 李家强 金荣洪 耿军平 范瑜 毛炜 |
| 作者单位： | 上海交通大学电子工程系,上海,200030;常熟理工学院物理与电子科学系,常熟,215500 |
| 摘 要： | 该文针对线性调频信号，提出一种基于分数阶波包变换分析方法高斯短时分数阶傅里叶变换。通过旋转角度的搜索及高斯窗口宽度的调整，能够在低信噪比条件下对多分量LFM信号进行检测，避免交叉项的出现，并能得到参数的估计值。通过推导分析给出变换结果的解析表达式，计算机仿真结果也表明了该变换的有效性。 |
| 关 键 词： | 线性调频信号 分数阶傅里叶变换 信号检测 参数估计 |
| 文章编号： | 1009-5896（2007）03-0570-04 |
| 收稿时间： | 2005-07-18 |
| 修稿时间： | 2006-09-18 |
Detection and Estimation of Multi-component LFM Signals Based on Gauss Short-Time Fractional Fourier Transform |
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| Li Jia-qiang, Jin Rong-hong, Geng Jun-ping, Fan Yu, Mao Wei . Detection and Estimation of Multi-component LFM Signals Based on Gauss Short-Time Fractional Fourier Transform[J]. Journal of Electronics & Information Technology, 2007, 29(3): 570-573. doi: 10.3724/SP.J.1146.2005.00857 | |
| Authors: | Li Jia-qiang Jin Rong-hong Geng Jun-ping Fan Yu Mao Wei |
| Affiliation: | Dept. of Electronic Eng., Shanghai Jiaotong Univ., Shanghai 200030, China;Dept. of Physics and Electronic Science, Changshu Institute of Technology, Changshu 215500, China |
| Abstract: | Based on fractional wave packet transform, a new hybrid time-frequency transform: Gauss Short-time Fractional Fourier Transform (GSFrFT) is proposed for the detection and estimation of Linear Frequency-Modulated (LFM) signals. Multiple LFM signals can be detected in low SNR by choosing the rotated angle and cross-items can be avoided. Analytical expression of the transform result is given. The simulation results also show that the GSFrFT is valid. |
| Keywords: | Linear Frequency-Modulated(LFM)signal Fractional Fourier transform Signal detection Parameter estimation |
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