| 基于FRFT的单矢量水听器目标方位估计 |
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| 引用本文： | 黄玉林,梁国龙,刘凯,范展.基于FRFT的单矢量水听器目标方位估计[J].应用科技,2011,38(2):9-12. |
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| 作者姓名： | 黄玉林 梁国龙 刘凯 范展 |
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| 作者单位： | 哈尔滨工程大学,水声技术重点实验室,黑龙江,哈尔滨,150001 |
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| 基金项目： | 哈尔滨工程大学基础研究基金资助项目 |
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| 摘 要： | 在单矢量水听器互谱方位估计基础上,提出了应用分数阶Fourier变换（FRFT）计算声强流谱并进行方位估计的方法.利用FRFT对线性调频信号（chirp）良好的能量聚集性,对chirp信号采用分数阶谱方位估计具有明显的优势.仿真结果表明,在各向同性干扰背景中,分数阶谱方位估计在较低信噪比下能有效估计目标方位,其估计精度高于频域互谱估计.
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| 关 键 词： | 分数阶Fourier变换 单矢量水听器 方位估计 线性调频信号 |
Application of FRFT to DOA estimation based on a single vector hydrophone |
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| HUANG Yulin,LIANG Guolong,LIU Kai,FAN Zhan.Application of FRFT to DOA estimation based on a single vector hydrophone[J].Applied Science and Technology,2011,38(2):9-12. |
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| Authors: | HUANG Yulin LIANG Guolong LIU Kai FAN Zhan |
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| Institution: | HUANG Yulin,LIANG Guolong,LIU Kai,FAN Zhan (The National Key Laboratory of Underwater Acoustic Technology,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | Based on a single vector hydrophone of cross spectrum direction of arrival(DOA) estimation,a new DOA estimation method is presented using the fractional Fourier transform(FRFT) to calculate spectrum of acoustic energy flux.Using good energy-focusing performance of FRFT to chirp signal,we can estimate the direction based on fractional spectrum.The simulation results show that this method can be effective to estimate the direction of target under low SNR and its precision is better than that of cross spectrum... |
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| Keywords: | FRFT single vector hydrophone DOA estimation chirp signal |
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