[1]杨亦春,程翔,陈庆生.提高时延估计精度的方法研究[J].南京理工大学学报(自然科学版),1999,(06):514-517.
 YangYichun ChengXiang ChenQingsheng.Methods of Improving Time delay Estimation Accuracy[J].Journal of Nanjing University of Science and Technology,1999,(06):514-517.
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提高时延估计精度的方法研究()
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
期数:
1999年06期
页码:
514-517
栏目:
出版日期:
1999-12-30

文章信息/Info

Title:
Methods of Improving Time delay Estimation Accuracy
作者:
杨亦春程翔陈庆生
南京理工大学机械学院, 南京210094
Author(s):
YangYichun ChengXiang ChenQingsheng
School of Mechanics,NUST,Nanjing 210094
关键词:
声探测 信号处理 目标探测 线性调频Z 变换 时延估计
Keywords:
acoust ic detect ing sig nal processing target detect ing CZT t ime-delay est imat ion
分类号:
TP274
摘要:
该文在分析各种时延估计方法的优缺点的基础上,研究提高时延估计计算精度的方法。文中提出采用线性调频Z变换的方法来提高时延估计的精度。结合采用广义互相关原理,采用线性调频Z 变换对直升机声音信号进行了仿真计算,在有一定相关噪声的条件下,时延估计误差的方差可以达到5 μs 以内,优于其它的时延估计方法的计算结果。反映了该方法是一种较好的方法,具有实际意义。将该方法用于智能雷弹中,可以使雷弹对直升机的声定距误差控制在30 % 以内。
Abstract:
Based on the analysis of the advantages and disadvantages of various t ime-delay est imation, the w ays to improve accuracy of t ime-delay est imat ion is studied in this paper. One w ay of using Linear Convolut ion Transform ( CZT ) has been presented to improve the accuracy . The accuracy is also improved by using CZT. The simulat ion calculat ion w as made as to sound signal from helicopter w ith CZT, combined w ith generalization correlat ion algorithms. T he result shows that across-error of the est imat ion w ill be less than 5 μs, it is bet ter than the results of other t ime-delay est imat ion algorithms. The method proved to be more workable and it is of help in pract ice as well. Error for mine to position of the helicopter can be cont rolled less than 30% w ith this method.

参考文献/References:

1 黄建人.一种利用高阶谱相位数据进行时延估计的新方法. 声学学报, 1997, 22( 2) : 132~138
2 吴喜录. 被动声探测技术—— 时延估计与目标识别: [ 博士学位论文].南京: 南京理工大学,1998
3 Alan V, Oppenheim W. Dig ital sig nal processing . Lo ndon: Prentice- hall International INC, 1975

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备注/Memo

备注/Memo:
杨亦春 男 33 岁 讲师
更新日期/Last Update: 2013-03-29