| 基于Lagrange插值的非整数延时滤波器算法 |
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| 引用本文： | 郭伟,潘仲明,杜金榜,王跃科. 基于Lagrange插值的非整数延时滤波器算法[J]. 国防科技大学学报, 2009, 31(1): 90-94 |
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| 作者姓名： | 郭伟 潘仲明 杜金榜 王跃科 |
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| 作者单位： | 国防科技大学,机电工程与自动化学院,湖南,长沙,410073 |
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| 摘 要： | 针对LMS(Least Mean Square)阵列信号波束成形器延时精度低和结构复杂的缺点,提出了一种基于Lagrange插值的非整数延时滤波器算法.其本质是采用频域近似的原则,设计出一种小数延时滤波器,可以将数字信号直接延时小数倍采样周期,在精确延时专题中具有广泛用途.仿真实验表明,该滤波器可满足阵列信号波束成形中的各种延时精度要求.
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| 关 键 词： | Lagrange插值 非整数延时 滤波器 |
| 收稿时间： | 2008-06-30 |
Fractional Delay Filter Algorithm Based on Lagrange Interpolation |
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| GUO Wei,PAN Zhongming,DU Jinbang and WANG Yueke. Fractional Delay Filter Algorithm Based on Lagrange Interpolation[J]. Journal of National University of Defense Technology, 2009, 31(1): 90-94 |
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| Authors: | GUO Wei PAN Zhongming DU Jinbang WANG Yueke |
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| Affiliation: | College of Mechatronics Engineering and Automation;National Univ.of Defense Technology;Changsha 410073;China |
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| Abstract: | This paper presents a kind of fractional delay filter algorithm on the basis of Lagrange interpolation in order to improve delay-time precision and to simplify the structure of LMS array signals.A sort of fractional delay filter is designed according to approximative algorithm in frequency-domain,the digital signal can be delayed with a fraction of the sample interval by it,and it is widely applied to the subjects which need accurate delay-time.Simulation results show that the fractional filter can fulfill ... |
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| Keywords: | Lagrange interpolation fractional delay filter |
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