| 引用本文: | 郭伟,潘仲明,杜金榜,等.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.[点击复制] |
| GUO Wei,PAN Zhongming,DU Jinbang,et al.Fractional Delay Filter Algorithm Based on Lagrange Interpolation[J].Journal of National University of Defense Technology,2009,31(1):90-94[点击复制] |
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| 基于Lagrange插值的非整数延时滤波器算法 |
| 郭伟, 潘仲明, 杜金榜, 王跃科 |
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(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。 |
| 关键词: Lagrange插值 非整数延时 滤波器 |
| DOI： |
| 投稿日期：2008-06-30 |
| 基金项目: |
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| Fractional Delay Filter Algorithm Based on Lagrange Interpolation |
| GUO Wei, PAN Zhongming, DU Jinbang, WANG Yueke |
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(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 the different delay-time desire for synthesizing array signal with high precision. |
| Keywords: Lagrange interpolation fractional delay filter |
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