Multipath Time-Delay Estimation Based on Homomorphic Filtering in Logarithm Domain

ZHANG Yao; FU Jin; WU Jian-guo

doi:10.3969/j.issn.0372-2112.2015.12.006

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Multipath Time-Delay Estimation Based on Homomorphic Filtering in Logarithm Domain

更新时间：2025-07-16

- Multipath Time-Delay Estimation Based on Homomorphic Filtering in Logarithm Domain
- Acta Electronica Sinica Vol. 43, Issue 12, Pages: 2381-2387(2015)
- 作者机构：
  
  1. 中国科学院沈阳自动化研究所机器人学国家重点实验室,辽宁,沈阳,110016
  2. 哈尔滨工程大学水声技术国家重点实验室,黑龙江,哈尔滨,150001
  3. 中国科学院沈阳自动化研究所机器人学国家重点实验室,辽宁,沈阳,110016
  4. 哈尔滨工程大学水声技术国家重点实验室,黑龙江,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2015.12.006
  CLC： TN911.7
- Published：2015
- 稿件说明：
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ZHANG Yao, FU Jin, WU Jian-guo. Multipath Time-Delay Estimation Based on Homomorphic Filtering in Logarithm Domain[J]. Acta Electronica Sinica, 2015, 43(12): 2381-2387.
DOI：

ZHANG Yao, FU Jin, WU Jian-guo. Multipath Time-Delay Estimation Based on Homomorphic Filtering in Logarithm Domain[J]. Acta Electronica Sinica, 2015, 43(12): 2381-2387. DOI： 10.3969/j.issn.0372-2112.2015.12.006.

摘要

针对水声信道中窄带信号的多途时延估计问题

本文在对复倒谱时延估计方法进行研究的基础上

提出了一种基于对数域同态滤波的时延估计算法.结合复倒谱与同态滤波思想

将接收的窄带信号首先变换到对数域

然后与本地存储的信号进行谱减法

再对相减后的信号进行滤波以消除残余的信号与噪声成分

最后将其恢复到时域以获取多途时延估计.与传统的匹配滤波/相关处理以及复倒谱分析方法相比

本文算法具有时延估计精度高、噪声抑制能力较强等特点.仿真与湖试数据处理结果证明了该方法的有效性.

Abstract

Aiming at solving the problem of multipath time-delay estimation for narrow-band signal in underwater acoustic channel

this paper studied the cepstrum method and proposed a time-delay estimation algorithm based on logarithm domain homomorphic filtering.With the thoughts of spectrum and homomorphic filtering

the received signal is turned into logarithm domain and then subtracted by the stored signal.After the residual signal and noise is filtered

the signal is turned back into the time domain to get the multipath time-delay estimation.Compared with the conventional method filtering/correlation and cestrum methods

this algorithm has advantages in time-delay estimation precision and noise suppression capability.The validity of the proposed method is verified with simulation results and processed lake trial data.

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