| 基于分数阶频率域混合相关的线性调频信号检测与参数估计 |
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| 引用本文： | 李家强,金荣洪,耿军平,范瑜,毛炜.基于分数阶频率域混合相关的线性调频信号检测与参数估计[J].上海交通大学学报,2006,40(9):1478-1482. |
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| 作者姓名： | 李家强 金荣洪 耿军平 范瑜 毛炜 |
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| 作者单位： | 1. 上海交通大学,电子工程系,上海,200240
2. 常熟理工学院,物理与电子科学系,常熟,215500 |
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| 摘 要： | 针对线性调频(LFM)信号分数阶傅里叶变换的特性,提出了一种分数阶频率域相关算法.该算法不仅能够在低信噪比条件下对LFM信号进行检测,还能与时间域相关法混合求解,获得包含时延及多谱勒频移参数的信息,实现精确参数估计.在分数阶频率域相关中,不必进行角度的一维及二维搜索,具有简洁、高效的特点.计算机仿真结果表明,该方法是有效的.
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| 关 键 词： | 线性调频信号 分数阶傅里叶变换 参数估计 |
| 文章编号： | 1006-2467(2006)09-1478-05 |
| 收稿时间： | 2005-09-27 |
| 修稿时间： | 2005年9月27日 |
The Detection and Joint Parameters Estimation of LFM Signals Based on a Hybrid Correlation Algorithm on Fractional Frequency Domain |
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| LI Jia-qiang,JIN Rong-hong,GENG Jun-ping,FAN Yu,MAO Wei.The Detection and Joint Parameters Estimation of LFM Signals Based on a Hybrid Correlation Algorithm on Fractional Frequency Domain[J].Journal of Shanghai Jiaotong University,2006,40(9):1478-1482. |
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| Authors: | LI Jia-qiang JIN Rong-hong GENG Jun-ping FAN Yu MAO Wei |
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| Institution: | 1. Dept. of Electronic Eng. , Shanghai Jiaotong Univ. , Shanghai 200240, China; 2. Dept. of Physics and Electronic Science, Changshu Inst. of Technology, Changshu 215500, China |
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| Abstract: | This paper aims at the linear frequency-modulated(LFM) signal's characters of fractional Fourier transform.A new correlation algorithm on fractional frequency domain was proposed,by which not only can the echo LFM signals be detected,but also the Doppler shifts and time delay can be estimated accurately with the correlation on time domain,even for the case of low SNR.Meanwhile,it is not necessary to search the rotated angle in one-dimensional or two-dimensional spaces,so that the algorithm is also simple and of high efficiency.The simulation results show its effectiveness. |
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| Keywords: | linear frequency-modulated(LFM) signal fractional Fourier transform parameters estimation |
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