| 小波降噪提高时延估计精度的研究 |
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| 引用本文： | 梁芳,索亮. 小波降噪提高时延估计精度的研究[J]. 应用光学, 2011, 32(1): 65-69 |
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| 作者姓名： | 梁芳 索亮 |
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| 作者单位： | 中北大学,信息探测与处理技术研究所,山西,太原,030051 |
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| 摘 要： | 为了估计两个在空间上分离的传感器所接收信号之间的时间延迟,结合小波降噪的特点,提出了一种基于小波降噪的广义相关时延估计算法.鉴于传统阈值降噪的不足,对小波阙值的选取进行改进,研究出一种新的小波阈值降噪技术.该算法克服了传统广义相关法需要信号和噪声先验知识的局限性,放宽了直接互相关法对信号和噪声的假设条件.仿真和实验结果...
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| 关 键 词： | 小波降噪 广义相关 时延估计 低信噪比 |
Improving accuracy of delay estimation in wavelet denoising |
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| LIANG Fang,SUO Liang. Improving accuracy of delay estimation in wavelet denoising[J]. Journal of Applied Optics, 2011, 32(1): 65-69 |
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| Authors: | LIANG Fang SUO Liang |
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| Affiliation: | LIANG Fang,SUO Liang(Institute of Signal Capturing & Processing Technology,North University of China,Taiyuan 030051,China) |
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| Abstract: | For estimating time difference of the received signals from two spatial separated sensors,this paper puts forward a special generalized correlation algorithm for the estimation of time delay based on wavelet denoising according to wavelet denoising theory.Since the denoising of the traditional hard and soft threshold is insufficient,the selection of wavelet threshold is improved,a new wavelet thresholding technique is developed.This algorithm is not limited by a priori knowledge of signal and noise needed i... |
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| Keywords: | wavelet denoising generalized correlation estimation of time delay low signal to noise ratio |
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