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基于噪声抑制门的两级自适应线谱增强算法

马凯 蔡昱明 王易川 程玉胜

马凯, 蔡昱明, 王易川, 程玉胜. 基于噪声抑制门的两级自适应线谱增强算法[J]. 电子与信息学报, 2021, 43(3): 773-780. doi: 10.11999/JEIT200540
引用本文: 马凯, 蔡昱明, 王易川, 程玉胜. 基于噪声抑制门的两级自适应线谱增强算法[J]. 电子与信息学报, 2021, 43(3): 773-780. doi: 10.11999/JEIT200540
Kai MA, Yuming CAI, Yichuan WANG, Yusheng CHENG. An Algorithm of Two-level Adaptive Line-spectrum Enhancement Based on Noise Suppression Gate[J]. Journal of Electronics and Information Technology, 2021, 43(3): 773-780. doi: 10.11999/JEIT200540
Citation: Kai MA, Yuming CAI, Yichuan WANG, Yusheng CHENG. An Algorithm of Two-level Adaptive Line-spectrum Enhancement Based on Noise Suppression Gate[J]. Journal of Electronics and Information Technology, 2021, 43(3): 773-780. doi: 10.11999/JEIT200540

基于噪声抑制门的两级自适应线谱增强算法

doi: 10.11999/JEIT200540
详细信息
    作者简介:

    马凯:男,1993年生,博士,研究方向为水声目标识别

    蔡昱明:男,1982年生,工程师,研究方向为水声探测

    王易川:男,1976年生,副教授,研究方向为水声目标识别

    程玉胜:男,1963年生,教授,研究方向为水声目标识别

    通讯作者:

    马凯 makainue@163.com

  • 中图分类号: TN911.7

An Algorithm of Two-level Adaptive Line-spectrum Enhancement Based on Noise Suppression Gate

  • 摘要: 针对低信噪比下,自适应线谱增强(ALE)算法在低信噪比时性能急剧下降的问题,该文提出2级ALE算法,该算法在普通的ALE算法的基础上,将输出信号和误差信号的傅里叶变换作为第2级ALE的输入,对线谱作进一步增强。并利用噪声抑制门对信号进行降噪预处理,然后结合提出的2级ALE算法,提出一种基于噪声抑制门的2级ALE算法,进一步提高信噪比,增强线谱。仿真和海试数据表明,算法性能较普通ALE算法有较大提升。
  • 图  1  ${R_n}\left( t \right)$

    图  2  ${R_s}\left( t \right)$

    图  3  噪声抑制门示意图

    图  4  2种方法频谱图对比

    图  5  ALE原理框图

    图  6  2级ALE原理框图

    图  7  3种算法的频谱图

    图  8  更低信噪比下3种算法的频谱图

    图  9  3种算法处理后的频谱图对比

    图  10  同一时刻3种算法处理后的频谱图对比

    图  11  基于噪声抑制门的2级ALE算法处理流程

    图  12  3种算法处理后的频谱图对比

    图  13  3种算法处理后的频谱图对比

    图  14  同一时刻3种算法处理后的频谱图对比

    图  15  3种算法处理后的频谱图对比

    表  1  3种算法处理后的线谱信噪比比较(dB)

    线谱(Hz)原始频谱信噪比1级ALE处理后的信噪比2级ALE处理后的信噪比
    985.210.211.0
    1241.64.66.0
    2573.89.710.1
    下载: 导出CSV

    表  2  3种算法处理后的线谱信噪比比较(dB)

    线谱(Hz)原始频谱信噪比2级ALE处理后的信噪比基于噪声抑制门的2级ALE处理后的信噪比
    985.211.017.9
    1241.66.016.0
    2573.810.120.8
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-07-02
  • 修回日期:  2020-10-29
  • 网络出版日期:  2020-12-14
  • 刊出日期:  2021-03-22

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