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A Maximum-Entropy Method for Estimating the Spectrum
作者姓名:陈正寿  王莉萍  于定勇  Wu-joan  KIM
作者单位:[1]Engineering College, Ocean University of China, Qingdao 266100, China [2]Mathematics Department, Ocean University of China, Qingdao 266100, China [3]Department of Naval Architecture & Marine Engineering , Mokpo National University
基金项目:国家自然科学基金;教育部高等学校博士学科点专项科研基金
摘    要:Based on the maximum-entropy(ME)principle,a new power spectral estimator for random waves is derived in the form of S~(ω)=a/8H~2(2π)~(d 1)ω~-~((d 2))exp-b(2π/ω)~n],by solving a variational problem subject to some quite general constraints.This robust method is comprehensive enough to describe the wave spectra even in extreme wave conditions and is superior to periodogram method that is not suitable to process comparatively short or intensively unsteady signals for its tremendous boundary effect and some inherent defects of FFT.Fortunately,the newly derived method for spectral estimation works fairly well,even though the sample data sets are very short and unsteady,and the reliability and efficiency of this spectral estimator have been preliminarily proved.

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A Maximum-Entropy Method for Estimating the Spectrum
CHEN Zheng-shou,WANG Li-ping,YU Ding-yong,Wu-joan KIM.A Maximum-Entropy Method for Estimating the Spectrum[J].China Ocean Engineering,2007,21(4):587-596.
Authors:CHEN Zheng-shou  WANG Li-ping  YU Ding-yong  Wu-joan KIM
Abstract:
Keywords:maximum-entropy method (MEM)  maximum-entropy spectral estimator  PDF  periodogram method
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