摘要
针对硬阈值去噪效果不理想,软阈值去噪比较平滑使得信号产生失真的问题,提出了一种新的阈值去噪方法.采用对阈值门限进行改进并结合软阈值的去噪方法对电能质量信号进行处理,实现其去噪的功能.实验仿真表明,新的阈值去噪算法对电能质量信号进行去噪处理后的信噪比增益和均方误差相对于其他文献都有所改善.
Hard threshold is poor in denoising, and soft threshold makes signal distortion because of smooth transition in the process of denoising, thus a new threshold denoising method is presented. The algorithm processes power quality signals by combining threshold improvement and soft threshold value to achieve denoising function. The results show that the improved algorithm makes better MSE performance and SNR gains than some improved threshold algorithm in other literatures.
出处
《应用科技》
CAS
2012年第2期15-18,共4页
Applied Science and Technology
基金
中国博士后科学基金资助项目(20110491087)
关键词
电能质量
阈值去噪
信噪比
均方误差
power quality
signal denoising threshold denoising
SNR
MSE
wavelet threshold
