摘要
文章根据含有白噪声的阶跃信号的频谱特点,采用了离散小波变换的方法对该突变信号进行去噪。实验证明,若选用合适的阈值方案,利用小波变换进行去噪,其效果将明显优越于基于传统傅立叶变换的理想低通滤波去噪。
According to the spectrum feature of step signal with white noise,a method of noise reducing by using discrete wavelet transtormation is introduced in this paper.The simulation shows that,if we choose proper threshold,the effect of noise reducing by using discrete wavelet is better than that of noise reducing by using ideal lowpass-filter based on DFT.
