电测与仪表2016，Vol.53Issue(17)：23-28,6.
基于分段 CEEMD 降噪的时延估计研究
Research on time delay estimation on the basis of signal choppingbased CEEMD de-noising
刘莹 1郭亚丽 1韩焱1
作者信息
- 1. 中北大学信息探测与处理山西省重点实验室，太原030051
- 折叠
摘要
Abstract
In order to improve the accuracy and speed of TDE in the case that the signals are non-stationary and con-tain a large number of sampling points , a new method for generalized cross =correlation TDE method on the basis of signal chopping-based CEEMD de-noising is proposed in this paper .Firstly, the original large-signal is divided into several smaller sections with equal length for each one , and then, each section is de-noised by using CEEMD thresh-old de-noising method , all the smaller sections are combined to obtain the de-noised version of the original signals . Furthermore , the time delay value is estimated according to the cross-correlation peak of the de-noised signals .For the selection of the numbers of sections and added noise in the process of TDE , the specific range of these two parameters is given by exploring the effect of these two parameters on de-noising precision , calculation time and other performance of the dummy walking signal .Finally, this method is applied to the TDE in acoustic source localization system .The results show that this method can still estimate time delay value rapidly and accurately when the signals contain a large number of sampling points and the SNR is low .关键词
CEEMD/信号分段/广义互相关/时延估计/降噪Key words
CEEMD/signal chopping/generalized cross-correlation/TDE/de-noising分类
信息技术与安全科学引用本文复制引用
刘莹,郭亚丽,韩焱..基于分段 CEEMD 降噪的时延估计研究[J].电测与仪表,2016,53(17):23-28,6.
