Simulation of dynamic light scattering signal based on wavelet transform

In order to simulate the dynamic light scattering ( DLS) signal of the ultrafine particles. According to the relationship of power spectrum of fluctuating light intensity signal and wavelet coefficients of every scale, this paper proposes a simulation method of DLS signal based on wavelet transform. This method generates the wavelet coefficients of each scale by theory power spectrum of particles and then the signal of DLS simulation can be obtained by inverse wavelet transform. By this method, the DLS signals of 100 nm,500 nm,1000 nm particles were respectively simulated. The power spectrum of every simulation signal performs a great agreement with its theory value. The power spectrums of the simulation signals were respectively inversed and inversion errors are less than 3.21%. It shows that simulation method based on wavelet transform used for simulation of DLS signal is feasible.