现代电子技术2016，Vol.39Issue(11)：9-12,4.DOI:10.16652/j.issn.1004-373x.2016.11.003
基于自适应稀疏分解的探地雷达水平分层介质时延估计
GPR horizontally-layered medium time delay estimation based on adaptive sparse decomposition
摘要
Abstract
Since the traditional time delay estimation method is restricted by the Rayleigh limit,some subspace⁃based methods can reach high resolution or super⁃resolution. However,the subspace⁃based methods have large data size for processing and high computation complexity. A new horizontally⁃layered medium time delay estimation method of using ground penetrating radar (GPR)is proposed,which is based on adaptive sparse decomposition(ASD),and in which the traditional parameter estimation is turned to the dictionary learning by ASD. A few atoms are selected from the over⁃complete dictionary by means of ASD,and their corresponding time parameter is the estimating time delay. In comparison with the traditional subspace⁃based methods,this algorithm has higher estimation accuracy at low signal⁃to⁃noise ratio(SNR),and can directly run in time domain,so as to re⁃duce computational complexity. The simulation and actual measured results show that the proposed algorithm has better advan⁃tage than the MUSIC(multiple signal classification)algorithm in the aspect of time delay estimation.关键词
自适应稀疏分解/探地雷达/水平分层介质/过完备字典/时延估计Key words
adaptive sparse decomposition/ground penetrating radar/horizontally-layered medium/over-complete dictio-nary/time delay estimation分类
信息技术与安全科学引用本文复制引用
陈青玉,周辉林,王玉皞,段荣行..基于自适应稀疏分解的探地雷达水平分层介质时延估计[J].现代电子技术,2016,39(11):9-12,4.
