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Volume 27 Issue 2
Feb.  2001
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Journal of Beijing University of Aeronautics and Astronautics  > 2001  >  27(2): 221-225.
LI He-sheng, MAO Jian-qin, HAN Yuet al. Application of Wavelet Transform to　Ground Echo-s Noise Processing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(2): 221-225. (in Chinese)
Citation: LI He-sheng, MAO Jian-qin, HAN Yuet al. Application of Wavelet Transform to　Ground Echo-s Noise Processing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(2): 221-225. (in Chinese)
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Application of Wavelet Transform to　Ground Echo-s Noise Processing

  • 1.

    Beijing University of Aeronautics and Astronautics, School of Science

  • 2. Chinese Academy of Engineering Physics, Institute of Electronic Engineering

  • Received Date: 08 Nov 1999
  • Publish Date: 28 Feb 2001
    Abstract
  • Based on the wavelet transform and its multiscale decompositions, it is possible to grasp the slight changes of characteristic information carried by image's edge on every scale. The laws have been analysed, which are followed by local maximal of wavelet transform modulus of white noise and continuous signal on different scales. An algorithm is developed to remove white noises from signals by analyzing the evolution of local maximals of wavelet transform modulus at acrossing scales. The numerical simulation proves that the algorithm is efficient. It is possible to provide an efficient approach to low-SNR radar signal detection in the future.

     

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  • [1] 陈逢时.子波变换理论及在信号处理中的应用[M]. 长沙:国防科技大学出版社,1998. [2] 郑中基.小波变换在地震道奇异性检测中的应用[J].重庆邮电学院学报,1997,9(1):66~69. [3] Mallat S, Hang W L. Singularity detection and processing with wavelets . IEEE Trans on Information Theory, 1992,38(2):617~643. [4] Daubechies I. The wavelet transform time-frequency localization and signal analysis[J]. IEEE Trans on Information Theory, 1990,36(3):961~1005. [5] 李合生,毛剑琴,张富堂. 基于多尺度小波能量积累的雷达回波信号检测方法研究[J]. 系统工程与电子技术,2000,22(11):46~48．
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