Long-range BOTDA denoising with multi-threshold 2D discrete wavelet
Xianyang Qian, Zinan Wang, Wei Sun, Bin Zhang, Qiheng He, Li Zhang, Han Shui Wu, Yunjiang Rao · 2016
Multi-threshold 2D discrete wavelet based on BayesShrink method is utilized to enhance the SNR of BOTDA. Then a 154.42 BOTDA is experimentally demonstrated with 40ns pump pulses, and the measurement uncertainty is reduced from ±1.52MHz down to ±1.03MHz.