小波变换在信号去噪方面的仿真研究

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摘 要:文章主要通过对小波变换的深入分析和研究,分析硬阈值函数和软阈值函数的优缺点,在相关文献的基础上对阈值函数进行改进,最后通过MATLAB仿真实现改进阈值函数的去噪,在信噪比和均方根误差上都有一定的改善,获得更好的去噪效果。
关键词:小波变换;阈值函数;信号去噪;信噪比
中图分类号:TN912.3 文献标志码:A 文章编号:2095-2945(2022)05-0048-03
Abstract: Through the in-depth analysis and research of wavelet transform, this paper analyzes the advantages and disadvantages of hard threshold function and soft threshold function, and improves the threshold function based on the related literature. Finally, the denoising of the improved threshold function is realized by MATLAB simulation, and the signal-to-noise ratio (SNR) and root mean square error are improved to a certain extent, and a better denoising effect is obtained.
Keywords: wavelet transform; threshold function; signal denoising; signal-to-noise ratio (SNR)
在日常的生活和学习中,信号在传输过程中很容易受到外界因素的影响,所传输的实际信息也会因此受到影响。(剩余2604字)