基于对数域同态滤波的时延估计算法研究

doi:10.3969/j.issn.0372-2112.2015.12.006

电子学报 ›› 2015, Vol. 43 ›› Issue (12): 2381-2387.DOI: 10.3969/j.issn.0372-2112.2015.12.006

基于对数域同态滤波的时延估计算法研究

张瑶¹, 付进², 武建国¹

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

收稿日期:2014-05-06 修回日期:2014-11-01 出版日期:2015-12-25
- 作者简介:
- 张瑶男,1984年10月出生于辽宁省建昌县,博士,助理研究员,主要研究方向为:水声信号处理,AUV目标探测与跟踪等.E-mail:zhangyao@sia.cn
- 基金资助:
- 国家自然科学基金 (No.51209059); 中国科学院科技创新重点部署项目 (No.KGFZD-125-014); 哈尔滨市科技创新人才研究专项 (No.2013RFQXJ101); 黑龙江省普通高等学校青年学术骨干支持计划 (No.1253G019)

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

ZHANG Yao¹, FU Jin², WU Jian-guo¹

1. Key Laboratory of Robotics, Shenyang Institite of Automation, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China;
2. National Laboratrry of Underwater Acoustci Technology, Harbin Engineering University, Harbin, Heilongjiang 150001, China

Received:2014-05-06 Revised:2014-11-01 Online:2015-12-25 Published:2015-12-25

摘要/Abstract

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.

关键词: 窄带信号, 多途时延估计, 谱减法, 同态滤波

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.

Key words: narrow-band signal, multipath time-delay estimation, spectral subtraction, homomorphic filtering

中图分类号:

TN911.7

张瑶, 付进, 武建国. 基于对数域同态滤波的时延估计算法研究[J]. 电子学报, 2015, 43(12): 2381-2387.

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.

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基于对数域同态滤波的时延估计算法研究

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

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