干扰抑制门在线谱提取中的应用

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摘要由于舰船辐射噪声和海洋环境噪声的复杂性，直接从舰船辐射噪声解调信号中提取线谱比较困难。为了降低线谱提取过程中宽带噪声干扰的影响，设计了一个干扰抑制门。对单频输入信号和谐波输入信号的仿真，验证了抑制算法的有效性，同时对干扰抑制门的信噪比增益进行了统计分析。对实测舰船辐射噪声数据处理，结果表明干扰抑制门的应用能有效降低信号中的宽带干扰，为线谱提取提供便利。从线谱中提取的螺旋桨轴频可作为舰船目标分类和识别的特征量。干扰抑制门算法亦可用于线谱检测。

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	牛芳1
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	惠娟1
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	赵安邦1
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关键词 ：干扰抑制门, 线谱提取, 轴频, 舰船辐射噪声

Abstract：Due to complexity of ship radiated noise and marine environment noise, it is difficult to directly extract line spectra from demodulated signals of ship radiated noise.Here, an interference suppression gate was designed to suppress broadband noise interference in line spectrum extraction.Simulations for single-frequency input signal and harmonic input one verified the effectiveness of the suppression algorithm.Moreover, statistical analysis was performed for the output signal to noise ratio (SNR) gain of the interference suppression gate.The processing results of actual ship radiated noise data showed that application of interference suppression gate can effectively reduce broadband noise interference, and provide convenience for line spectrum extraction; the extracted propeller shaft frequency can be taken as a feature quantity for ship target classification and recognition; the interference suppression gate algorithm can also be applied in line spectrum detection.

Key words： interference suppression gate line spectrum extraction shaft frequency ship radiated noise

收稿日期: 2018-03-19 出版日期: 2019-11-28

引用本文:

牛芳1,2,3，惠娟1,2,3，赵安邦1,2,3,4. 干扰抑制门在线谱提取中的应用[J]. 振动与冲击, 2019, 38(23): 253-258.
NIU Fang1, 2, 3, HUI Juan1, 2, 3, ZHAO Anbang1, 2, 3, 4. Application of interference suppression gate in line spectrum extraction. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(23): 253-258.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I23/253

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