基于改进的小波阈值去噪在大气电场中的应用

Ground atmospheric electric field instrument measured field strength data, often mixed with all kinds of interference noise. This will directly affect the conduct of its atmospheric electricity and lightning in the study area monitoring and early warning accuracy applications. In this paper, wavelet denoising principle, as well as soft, hard threshold exists for the over-smoothing function de-noising and the signal oscillation additional defects, an improved threshold function models, making soft and hard threshold function can be a good compromise. Meteorological Bureau in Shenzhen Long gang base surface atmospheric electric field data measured in the seven-layer wavelet decomposition, respectively noising soft threshold function, a function of the hard threshold de-noising and de-noising threshold function improved simulation. The results show that the improved denoising threshold function better than the soft and hard threshold effect.