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| 旋转线性调频信号的分析与设计 | |
| 引用本文： | 张小乾,姚远程,王凌,秦明伟. 旋转线性调频信号的分析与设计[J]. 北京邮电大学学报, 2014, 37(6): 59-62. DOI: 10.13190/j.jbupt.2014.06.012 |
| 作者姓名： | 张小乾 姚远程 王凌 秦明伟 |
| 作者单位： | 1. 西南科技大学 信息工程学院, 四川 绵阳 621010; 2. 中国工程物理研究院 院机关, 四川 绵阳 621999 |
| 基金项目： | 国防科工委民用航天技术研究所项目 |
| 摘 要： | 为提高复合线性调频(CLFM)信号的距离速度联合分辨力,提出了一种基于分数阶傅里叶变换的旋转线性调频(RLFM)信号,给出了设计方法,仿真得到了RLFM信号的模糊函数图、-3dB模糊度图、距离模糊函数图及速度模糊函数图,最后将其与CLFM信号进行了对比,结果显示,当旋转角度α满足1/2 α<5/6时,RLFM信号具有更好的速度分辨力和距离速度联合分辨力. |
| 关 键 词： | 旋转线性调频信号 分数阶傅里叶变换 模糊函数 分辨力 |
| 收稿时间： | 2013-07-04 |
Analysis and Design of RLFM Signal |
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| ZHANG Xiao-qian,YAO Yuan-cheng,WANG Ling,QIN Ming-wei. Analysis and Design of RLFM Signal[J]. Journal of Beijing University of Posts and Telecommunications, 2014, 37(6): 59-62. DOI: 10.13190/j.jbupt.2014.06.012 | |
| Authors: | ZHANG Xiao-qian YAO Yuan-cheng WANG Ling QIN Ming-wei |
| Affiliation: | 1. Faculty of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China; 2. Administrative agency, China Academy of Engineering Physics, Mianyang 621999, China |
| Abstract: | In order to improve the joint distance-velocity-resolution of the composed linear frequency modulation (CLFM) signal, a rotated linear frequency modulation (RLFM) signal based on fractional Fourier transform is proposed. The design method of RLFM signal is given, and the simulations of the signal about the ambiguity function, -3dB ambiguity graph, distance ambiguity graph and velocity ambiguity graph have been presented. Finally to put RLFM signal and CLFM signal are compared. The differences of them show that the RLFM signal has a better performance on velocity resolution and joint distance-velocity- resolution than the CLFM signal. |
| Keywords: | rotated linear frequency modulation signal fractional Fourier transform ambiguity function resolution |
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