基于WVD-HT的SAR/ISAR多運動目標(biāo)檢測
MULTITARGETS DETECTING WITH SAR/ISAR BASED ON THE WVD-HT
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摘要: 本文提出和研究了基于Wigner-Ville分布(WVD)和Hough變換(HT)的合成孔徑雷達(SAR)和逆合成孔徑雷達(ISAR)對多運動目標(biāo)成象的運動補償新方法,給出了多運動目標(biāo)檢測、參數(shù)估算和運動補償?shù)闹饕襟E。理論分析、計算機和微波暗室模擬實驗的結(jié)果表明,新方法對交叉項和噪聲的抑制是有效的,它與單一的WVD法相比,提高了在噪聲中對單個和多個運動目標(biāo)檢測及其參數(shù)估算的能力。Abstract: A new method for the motion compensation of multiple moving targets imaging with SAR/ISAR based on Wigner-Ville and Hough transform is presented and studied. The main steps for motion detection, estimation and compensation are given. The simulated experimental results with computer and microwave anechoic chamber show that the new method is effective for suppressing the cross-terms and noise, so it is clear the new method is an improvement on a unitary WVD method, and the new method can be used to improve the detection and estimation capability of single or multiple moving targets in noisy enviroment.
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Classen T A C M, et al. The Wigner distribution-A tool for frequency signal analysis, Part I. Philips J. Res. 1980, 35(3): 217-250.[2]Chois H I, et al. Improved time-frequency representation of multicomponent signals using exponential[3]kernels, IEEE Trans. on ASSP, 1989, ASSP-37(6): 862-871.[4]Mao Y, et al. Motion compensation of multitargets imaging with ISAR based on the time-frequency distribution, ICCEA 94, Beijing: 1994, 316-319.[5]Barbarsa S, et al. A combined Wigner-Ville and Hough transform for cross-terms suppression and optimal detection and parameter estimation, Proc. ICASS92, San Francisco: 1992, v-173-v-176.[6]陳國安.合成孔徑雷達對地面運動目標(biāo)檢側(cè)和成象方法的研究:[碩士論文].北京:中國科學(xué)院電子學(xué)研究所,1995年6月. -
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