计算机工程 ›› 2007, Vol. 33 ›› Issue (21): 265-267.doi: 10.3969/j.issn.1000-3428.2007.21.094

• 开发研究与设计技术 • 上一篇    下一篇

基于二次相关的时延估计方法

唐 娟,行鸿彦   

  1. (南京信息工程大学电子与信息系,南京210044)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-11-05 发布日期:2007-11-05

Time Delay Estimation Based on Second Correlation

TANG Juan, XING Hong-yan   

  1. (Dep. of Electronic and Information Engineering, Nanjing University of Information and Science Technology, Nanjing 210044)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-11-05 Published:2007-11-05

摘要: 在研究广义相关时延估计方法和二次相关时延估计方法的基础上,将自相关和互相关结合起来,分别对不同噪声背景下的平稳窄带信号进行了时延估计,从理论上指出了二次相关法的可行性及其适用条件。实验仿真的结果表明,与一次相关法相比较,二次相关法可在更低信噪比的情况下,取得较高的时延估计精度。

关键词: 时延估计, 广义相关, 二次相关

Abstract: An algorithm combines the auto-correlation and inter-correlation to estimate the time delay of stabilized signal in different noises, based on the analysis of many generalized correlations. Theory analysis and simulation prove that the second correlation can obtain higher precision than the generalized correlation in lower SNR.

Key words: time delay estimation, generalized correlation, the second correlation

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