基于WVD-HT的SAR/ISAR多运动目标检测
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变换(HT)的合成孔径雷达(SAR)和逆合成孔径雷达(ISAR)对多运动目标成象的运动补偿新方法,给出了多运动目标检测、参数估算和运动补偿的主要步骤。理论分析、计算机和微波暗室模拟实验的结果表明,新方法对交叉项和噪声的抑制是有效的,它与单一的WVD法相比,提高了在噪声中对单个和多个运动目标检测及其参数估算的能力。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]陈国安.合成孔径雷达对地面运动目标检侧和成象方法的研究:[硕士论文].北京:中国科学院电子学研究所,1995年6月. -
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