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Methods of Improving Time delay Estimation Accuracy(PDF)

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
1999年06期
Page:
514-517
Research Field:
Publishing date:

Info

Title:
Methods of Improving Time delay Estimation Accuracy
Author(s):
YangYichun ChengXiang ChenQingsheng
School of Mechanics,NUST,Nanjing 210094
Keywords:
acoust ic detect ing sig nal processing target detect ing CZT t ime-delay est imat ion
PACS:
TP274
DOI:
-
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.

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

Memo

Memo:
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Last Update: 2013-03-29