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Optical Radar Target In The Theory Of Structural Imaging And Its Application In Radar Target Recognition

Posted on:2001-11-28Degree:DoctorType:Dissertation
Country:ChinaCandidate:W D JiangFull Text:PDF
GTID:1118360092998894Subject:Information and Communication Engineering
Abstract/Summary:PDF Full Text Request
In this paper, under the wideband radar background, the simulation method of radar clutter, the principle and estimation method of one-dimension and two-dimension physical structure features of radar target, some classification method using physical structure features of target, etc. are studied.In chapter 1, the fields of electromagnetic scattering characteristics of target, the method and previous researched result in the radar target recognition domain, the present situation and progress of harmonious estimation theory in modern spectrum estimation are briefly reviewed, also the main works of this paper are introduced.In chapter 2, some statistics models of radar clutters are investigated under the high resolution radar, and some relation between the input and output correlation coefficient of zeros memory nonlinearity(ZMNL) are analyzed, then the fast numerical method(called error controlled method) which utilize calculating input and output correlation coefficient of ZMNL is proposed. After the mathematics principle which use simulating well and Guassian probability distribution are reviewed, the simulation method of correlation Gaussian clutter based on AR model is presented. Finally, some experiment results are given.In chapter 3, under the wideband radar system, some parameter estimation methods of scattering center are studied in the white noise and clutter background. Based on the multi scattering center theory, the frequency model describing electromagnetic scattering characteristics of target is developed. Then, some typical scattering center estimation methods are lucubrated. In clutter condition, the parameter estimation algorithm which is no sensitivity to clutter is studied. Finally, based on one-dimension structure characteristics of target, the fully polarized correlation match recognition algorithm using range profile and the correlation match recognition algorithm using the scattering center position are proposed, and the experiment results suggest that the two recognition algorithms have fine classification characteristics.In chapter 4, firstly, the two-dimension scattering model of target under high resolution radar system is developed, the two dimension resolution rates are reviewed and coordinate transformation of data are discussed. Then, in white noise condition, a two-dimension scattering center estimation method which is called matrix pencil method of two-dimension harmonious restructure (MP2D) is proposed. The two-dimension RELAX algorithm which is used estimating the two-dimensional scattering center in clutter circumstance is studied.In chapter 5, the main works of this dissertation are summarized and the future researched areas are pointed out.
Keywords/Search Tags:Radar target recognition, Clutter, Scattering center, Range profile, Radar image, Parameter estimation, Spectrum estimation, Harmon, Feature extraction.
PDF Full Text Request
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