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

作　　者：HE Jingbo XU Jianghu 

机构地区：[1]Electronics Engineering College, Naval University of Engineering, Wuhan 430033, China

出　　处：《Acta Oceanologica Sinica》2017年第9期23-26,共4页海洋学报（英文版）

基　　金：The National Natural Science Foundation of China under contract No.61401493;the Naval University of Engineering Natural Science Foundation of China under contract No.HGDQNSQJJ15003

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 It o 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.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 It o 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.

关 键 词：random walk sea clutter MULTIFRACTAL 

分 类 号：P715[天文地球—海洋科学]