小波变换下改进的维纳滤波在信号去噪的应用

信号去噪是信号处理中最为重要的问题之一。由于小波变换具有时频局部化特点及能够灵活选择小波基,在信号去噪中得到了广泛应用。维纳滤波是数字信号处理中滤波去噪研究的一个主要内容。本文通过改进维纳滤波,并结合小波降噪的优点,提出了一种新的信号去噪的方法,实验证明该方法能够有效的实现信号去噪。

Signal denoising is one of the most important problems in signal processing. Wavelet transform is widely used in signal denoising because it has the characteristics of time frequency localization and flexible Selection of wavelet bases. Wiener filtering is one of the main research fields in digital signal processing. In this paper, a new method of signal denoising is pro- posed by improving the Wiener filtering and combining the advantages of wavelet denoising, Experimental results show that the method can effectively realize the signal de-noising.