The multifractal spectrum of a sea clutter using a random walk model

摘要

The radar echo signal of a sea clutter is nonlinear,nonstationary and time varying.A multifractal measure analysis can describe the local singularity of a physics system.The random walk model of a sea clutter scattering is analysed to disclose the intrinsic physical characteristics and laws of the sea clutter.Stochastic differential equations are given for the physical quality of the sea clutter.A diffusion process model is established using Ito formula.The singularity of the random walk model is tested by a multifractal spectroscopy,and the accuracy of this model is proven by the multifractal spectroscopy of a real-life IPIX radar data set.Thus,the random walk model is effective for describing the dynamics mechanism of the sea clutter.