| LFM信号参数联合估计新方法——域频率相差法 |
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| 引用本文： | 李家强,金荣洪,范瑜,毛炜.LFM信号参数联合估计新方法——域频率相差法[J].现代雷达,2006,28(1):45-48. |
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| 作者姓名： | 李家强 金荣洪 范瑜 毛炜 |
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| 作者单位： | 1. 上海交通大学区域光纤网与新型通信国家重点实验室,上海,200030
2. 常熟理工学院物理与电子科学系,常熟,215500 |
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| 摘 要： | 采用分数阶傅里叶变换域频率分析方法，针对线性调频连续波信号分数阶傅咀叶变换的特性，提出了分数阶域相差法，可以在低信噪比条件下对线性调频连续波信号进行检测，获得多普勒频移与实验的精确参数估计。同时时频参数联合估计中不必进行二维搜索，具有快速、高效的特点。计算机仿真结果表明了该方法的有效性。
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| 关 键 词： | 线性调频连续波信号 分数阶傅里叶变换 域频率相差法 参数联合估计 信噪比 |
| 收稿时间： | 2005-03-12 |
| 修稿时间： | 2005-10-12 |
Difference Method in Domain Frequency:A new Algorithm for Joint Parameter Estimation of LFM |
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| LI Jia-qiang,JIN Rong-hong,FAN Yu,MAO Wei.Difference Method in Domain Frequency:A new Algorithm for Joint Parameter Estimation of LFM[J].Modern Radar,2006,28(1):45-48. |
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| Authors: | LI Jia-qiang JIN Rong-hong FAN Yu MAO Wei |
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| Affiliation: | 1. State Key Lab. of Advanced Optical Communication System and Networks, Shanghai Jiaotong University, Shanghai 200030, China; 2. Department of Physics and Electronic science, Changshu Institute of Technology, Changshu 215500, China |
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| Abstract: | Based on the fractional Fourier transform of linear frequency modulated continuous signal,a new algorithm for joint parameter estimation of LFM: difference method in domain frequency is proposed.Doppler frequency shift and time delay of LFM signal can be estimated even for low SNR case without two-dimensional search,so that the method is of high efficiency.Simulation results show that the method is valid. |
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| Keywords: | LFM FRFT joint parameter estimation SNR |
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