| 基于均匀圆阵的LFM信号DOA估计 |
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| 引用本文： | 田贤峰,陈晓明.基于均匀圆阵的LFM信号DOA估计[J].计算机仿真,2010,27(9). |
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| 作者姓名： | 田贤峰 陈晓明 |
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| 作者单位： | 空军军训器材研究所,北京,100195 |
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| 基金项目： | 国家自然科学基金重点项目:L波段SAR电子干扰实现 |
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| 摘 要： | 针对为解决对雷达和通信中的线性调频信号源(LFM)定位的难题,为提高定位精度,提出了一种基于均匀圆阵的测向定位方法.方法通过分数傅立叶变换(FRFT)对LFM信号的能量聚焦特性,构造出一种新的FRFT域阵列数据模型;采用UCA-RB-MUSIC算法测向,通过模式激励法把阵元空间转换到实波束空间,对谱函数进行二维搜索,得到辐射源的方位角和俯仰角.通过理论推导和仿真验证,证明方法具有测向精度高、运算量小、360°全方位测向的优点.
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| 关 键 词： | 均匀圆阵 方位估计 分数傅立叶变换 多通道圆阵算法 线性调频信号 模式激励法 |
DOA Estimation of LFM Signals Based on UCA |
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| TIAN Xian-feng,CHEN Xiao-ming.DOA Estimation of LFM Signals Based on UCA[J].Computer Simulation,2010,27(9). |
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| Authors: | TIAN Xian-feng CHEN Xiao-ming |
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| Affiliation: | TIAN Xian-feng,CHEN Xiao-ming(Air Force Training Equipment Institute,Beijing 100195,China) |
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| Abstract: | A new DOA estimation algorithm based on uniform circular arrays is presented,in order to locate to LFM signals that radar and telecommunication satellite transmits. A new array model in FRFT domain is constructed based on the fact that LFM signal has the energy concentrated performance in the FRFT domain. Array space is transformed to beam-space through mode excitation method. Azimuth angle and pitching angle are calculated through UCA-RB-MUSIC estimation algorithm. Doppler frequency and chirp rate are not ... |
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| Keywords: | Uniform circular arrays (UCA) Estimation of DOA Fractional fourier transform (FRFT) UCA-RB-MUSIC algorithm LFM signal Mode excitation method |
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