| 基于全相位窄带滤波的超分辨率时延估计 |
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| 引用本文： | 闫格,黄翔东,刘开华. 基于全相位窄带滤波的超分辨率时延估计[J]. 天津大学学报(自然科学与工程技术版), 2014, 0(3): 249-254 |
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| 作者姓名： | 闫格 黄翔东 刘开华 |
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| 作者单位： | 天津大学电子信息工程学院,天津300072 |
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| 基金项目： | 天津市科技支撑计划资助项（10ZCKFGX03600）;国家自然科学基金资助项目（61271322）. |
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| 摘 要： | 为提高超分辨率时延估计的抗噪性能,提出了基于全相位窄带滤波的超分辨率时延估计算法.在陷波器设计方法基础上,设计出中心频点可精确控制的具有类点通传输特性的窄带滤波器,然后用该滤波器对存在时延关系的两路采样序列进行滤波处理,再依照传统相位差时延估计法,即可获得高精度时延估计.仿真实验表明:相比于基于信号重心插值的超分辨率时延估计法,该方法信噪比范围要高出10,dB,具有广阔的工程应用前景.
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| 关 键 词： | 时延估计 窄带滤波器 全相位 超分辨率 |
Super-Resolution Time Delay Estimation Based on All-Phase Narrow-Band Filtering |
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| Yan Ge,Huang Xiangdong,Liu Kaihua. Super-Resolution Time Delay Estimation Based on All-Phase Narrow-Band Filtering[J]. Journal of Tianjin University(Science and Technology), 2014, 0(3): 249-254 |
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| Authors: | Yan Ge Huang Xiangdong Liu Kaihua |
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| Affiliation: | (School ofElectronicInformationEngineering, TianjinUniversity, Tianjin300072, China) |
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| Abstract: | To enhance the anti-noise performance of super-resolution time delay estimators,one novel time-delay estimator based on all-phase narrow-band filtering was proposed. First,based on the design of notching filter,a nar-row-band filter characterized with similar point-pass transfer curve was designed. Secondly,two sequences with de-lay relationship were processed by this filer. Finally,implementing conventional phase-difference estimating flow yielded a high-precision time delay estimation. Simulation results showed that , compared with the gravity-interpolation method,the proposed method enlarges the SNR application range by 10 dB. Therefore the proposed method has a wide prospect of applied engineering. |
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| Keywords: | time delay estimation narrow-band filter all-phase super-resolution |
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