摘要
针对现有一些小波阈值去噪方法存在的不足,提出了一种新的阈值去噪算法。与传统的软、硬阈值以及已有的阈值去噪算法相比,新算法克服了估计小波系数和含噪信号的系数之间存在偏差的问题,具有较好的调节性和连续性。通过仿真实验表明,用新的阈值函数可以提高去噪质量,降低噪声干扰。
Aiming at the shortcomings of some existing wavelet threshold algorithms,a new wavelet denoising algorithm is proposed.Compared with traditional soft and hard thresholds and existing threshold denoising algorithms,the proposed method overcomes the deviation between the estimated wavelet coefficient and the noisy signal coefficient,and has a better regulation and continuity.The simulations results also illustrate that the proposed method improves the denoising quality and reduces the interference of the noise.
作者
李名莉
焦欣欣
LI Mingli;JIAO Xinxin(College of Electromechanical Automation,Henan Polytechnic University, Nanyang 473000)
出处
《计算机与数字工程》
2019年第7期1627-1630,共4页
Computer & Digital Engineering
关键词
阈值去噪
软、硬阈值
偏差
调节性
连续性
threshold denoising
soft and hard threshold
deviation,regulation,continuity
