WEAK SIGNAL DENOISING BASED ON THE CUMULATIVE AVERAGE OF THE TIME DOMAIN AND BISPECTRUM ESTIMATION

Traditional weak signal processing methods are not suitable for the broadband weak signal output from distributed fiber optic temperature sensor. On the basis of the simulate and analyze of time domain cumulative average and the bispectrum estimation, this paper proposed the weak signal de-noising method of combining time domain cumulative average with bispectrum estimation, the results show that this method can effectively extract the useful signal and bring down the noise.