电波科学学报2012，Vol.27Issue(4)：786-790,850-852,8.
基于相移偏移和匹配追踪的探地雷达成像方法
GPR imaging method based on the phase shift migration and the least-square matching pursuits
摘要
Abstract
A ground penetrating radar （GPR） imaging method is proposed based on the combination of the phase shift migration method and the least-square based matching pursuit algorithm （LSMP）, which produces the amplitude spectrum and the phase spectrum of the migrated data. The non-uniform fast Fourier transform （NUFFT） is incorporated into the phase shift migration method to evaluate the in- verse FFT more accurately and more efficiently than the conventional methods, which requires the interpolation of non-uniformly sampled data in wave-number space, before the regular FFT can be applied. The LSMP, in which the least-squares concept is introduced to the matching pursuit algorithm to avoiding the greedy search of the optimal atom in the atom dictionary, is applied to implement efficient- ly the spectral decomposition of the migrated data based on analytic trace and ana- lytic wavelets. The combined method proposed in this paper is tested on numericalsimulated data and field data. The results show that, compared to the phase shift migration, the combined method has an advantage of suppressing random noise and improving the GPR imaging quality greatly, and the detection and localization of GPR objects can be enhanced from low signal to noise ratio data by combing the am- plitude spectrum and the phase spectrum.关键词
探地雷达/相移偏移/匹配追踪/解析信号/谱分解Key words
ground penetrating radar (GPR)/phase shift migration/matching pur-suit/analytic signal/spectral decomposition分类
天文与地球科学引用本文复制引用
张建中,黄月琴..基于相移偏移和匹配追踪的探地雷达成像方法[J].电波科学学报,2012,27(4):786-790,850-852,8.基金项目
国家自然科学基金 （）
