Denoising of an ultraviolet light received signal based on improved wavelet transform threshold and threshold function
Hua Ping Guo, Leihui Yue, Peng Song, Yumei Tan, Lijian Zhang · Applied Optics · 2021
In this paper, the wavelet transform algorithm is used to reduce the noise of ultraviolet (UV) light received signals. An improved calculation method of the wavelet thresholds and a new threshold function are proposed. The new threshold function avoids the discontinuity of the traditional hard threshold function. It can also avoid the constant deviation caused by the traditional soft threshold function. The improved threshold calculation method takes into account the effect of the wavelet decomposition level, and the simulation results show the effectiveness of the proposed method. Compared with other methods, the method proposed in this paper can obtain a better denoising effect.