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水下目标辐射噪声时间序列的非线性降噪处理

侯平魁, 龚云帆, 杨毓英, 史习智, 林良骥

侯平魁, 龚云帆, 杨毓英, 史习智, 林良骥. 水下目标辐射噪声时间序列的非线性降噪处理[J]. 声学学报, 2001, 26(3): 207-211. DOI: 10.15949/j.cnki.0371-0025.2001.03.003
引用本文: 侯平魁, 龚云帆, 杨毓英, 史习智, 林良骥. 水下目标辐射噪声时间序列的非线性降噪处理[J]. 声学学报, 2001, 26(3): 207-211. DOI: 10.15949/j.cnki.0371-0025.2001.03.003
HOU Ping-kui, GONG Yun-fan, YANG Yu-ying, SHI Xi-zhi, LIN Liang-ji. Nonlinear noise reduction of the underwater target radiated noise time series[J]. ACTA ACUSTICA, 2001, 26(3): 207-211. DOI: 10.15949/j.cnki.0371-0025.2001.03.003
Citation: HOU Ping-kui, GONG Yun-fan, YANG Yu-ying, SHI Xi-zhi, LIN Liang-ji. Nonlinear noise reduction of the underwater target radiated noise time series[J]. ACTA ACUSTICA, 2001, 26(3): 207-211. DOI: 10.15949/j.cnki.0371-0025.2001.03.003
侯平魁, 龚云帆, 杨毓英, 史习智, 林良骥. 水下目标辐射噪声时间序列的非线性降噪处理[J]. 声学学报, 2001, 26(3): 207-211. CSTR: 32049.14.11-2065.2001.03.003
引用本文: 侯平魁, 龚云帆, 杨毓英, 史习智, 林良骥. 水下目标辐射噪声时间序列的非线性降噪处理[J]. 声学学报, 2001, 26(3): 207-211. CSTR: 32049.14.11-2065.2001.03.003
HOU Ping-kui, GONG Yun-fan, YANG Yu-ying, SHI Xi-zhi, LIN Liang-ji. Nonlinear noise reduction of the underwater target radiated noise time series[J]. ACTA ACUSTICA, 2001, 26(3): 207-211. CSTR: 32049.14.11-2065.2001.03.003
Citation: HOU Ping-kui, GONG Yun-fan, YANG Yu-ying, SHI Xi-zhi, LIN Liang-ji. Nonlinear noise reduction of the underwater target radiated noise time series[J]. ACTA ACUSTICA, 2001, 26(3): 207-211. CSTR: 32049.14.11-2065.2001.03.003

水下目标辐射噪声时间序列的非线性降噪处理

基金项目: 

国家自然科学基金资助项目(编号69772001)

详细信息
  • PACS: 

Nonlinear noise reduction of the underwater target radiated noise time series

  • 摘要: 噪声是信号检测和目标识别的障碍.对水下目标辐射噪声降噪,过去常用线性的方法来对信号进行滤波。对于线性系统产生的信号,用线性滤波方法可以达到较好的效果但对非线性系统产生的信号或受非线性因素影响较大的信号,用线性滤波万法不能很好地滤除噪声,已经证明,水下目标辐射噪声信号中具有明显的非线性成分。因此,本文提出运用非线性方法对水下目标辐射噪声时间序列进行降噪处理。通过降噪前后重构吸引子、关联积分曲线斜率及信噪比的比较,表明该方法对去除水下目标辐射噪声时间序列中的噪声干扰十分有效。
    Abstract: Noise affects strongly the detection of signals and target recognition. A lot of literatures have been printed on the linear noise reduction for the underwater target radiated signal. For linear systems, linear filtering methods are compatible. However, these noise reduction methods are not fit for the signal from nonlinear systems or the signal affected severely by the nonlinear factor.
    Non-linearity of signals radiated by the Underwater target have been proved in the latest literature. This presentation provided the noise reduction results with the nonlinear method. Irregular signals from nonlinear sources exhibit genuine broad band spectra and there is no justification to identify any continuous component in the spectrum as noise. Instead, structure in the reconstructed phase space will be exploited. This paper presents the difference between the reconstructed attractor of experimental time series and the noise reduced time series. Also, the difference of the correlation dimension and the signal-to-noise between experimental time series and the noise reduced time series is provided. According to the result, the nonlinear noise reduction method is effective for the underwater target radiated noise time series.
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出版历程
  • 收稿日期:  1999-09-20
  • 修回日期:  2000-04-24
  • 网络出版日期:  2022-07-31

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