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为提高对水下目标信号检测的有效性和可靠性,对水声基阵信号的干扰噪声进行分析,提出对含噪信号进行三维表面波变换的降噪方法.通过设置适当的阈值,对变换后的系数进行舍取处理,得到表征信号及微量残余噪声的重构系数;对其进行表面波逆变换后得到降噪后的水声基阵信号.对实际水声信号的降噪实验表明:该方法实现了对基阵信号的并行处理,取得了较好的降噪效果.
In order to improve the validity and reliability of underwater target signal detection, the noise of underwater acoustic signal is analyzed, and the noise reduction method of three-dimensional surface wave transform of noisy signal is proposed. By setting the appropriate threshold, After the coefficients are subtracted, the reconstructed coefficients of the signal and the trace residual noise are obtained, and the underwater acoustic signal after denoising is obtained.The noise reduction experiment of the actual underwater acoustic signal shows that: The method realizes the parallel processing of the array signal and achieves better noise reduction effect.