4Daniels D J. Surface penetrating radar[ M ].The institution of electrical engineers, 1996: 217-230.
5Scheers B. Ultrawideband ground penetrating radar with personnel Academy application to the detection of anti landmines [ D ]. Royal Military Sand-hurst,2001 : 125-136.
6Egil S E. Radar imaging of small objects closely below the earth surface [ D ]. Norwegian Dniversity of Science and Technology, 2000 : 89-98.
7John W B, Luc V K, Hichem S. penetrating radar data processing: Ground Clutter characterization and removal [ J ]. Technical report IRIS - TR - 0059,1999:286-302.
8David L, Donoho, Johnstone M. Threshold selection for wavelet shrinkage of noisy data [ J ]. IEEE, 1994:24-25.
