一维粗糙地表面下方埋藏目标SAR成像

计算物理 ›› 2012, Vol. 29 ›› Issue (5): 745-752.

一维粗糙地表面下方埋藏目标SAR成像

姬伟杰¹, 童创明^1,2

1. 空军工程大学导弹学院, 三原 713800;
2. 毫米波国家重点实验室, 南京 210096

收稿日期:2011-11-11 修回日期:2012-02-12 出版日期:2012-09-25 发布日期:2012-09-25
作者简介:姬伟杰(1985-),男,博士,研究方向为目标与环境散射及成像算法研究,E-mail:jiweijie01@163.com
基金资助:
毫米波国家重点实验室基金(K201201);陕西省自然科学基础研究计划(2011JM8025)资助项目

SAR Imaging of One-dimensional Rough Surface with a Buried Object

JI Weijie¹, TONG Chuangming^1,2

1. Missile Institute of Air Force Engineering University, Sanyuan 713800, China;
2. State Key Laboratory of Millimeter Waves, Nanjing 210096, China

Received:2011-11-11 Revised:2012-02-12 Online:2012-09-25 Published:2012-09-25

摘要/Abstract

摘要： 提出一种快速实现一维粗糙地表面下方埋藏金属目标的成像算法.用层内波传播算法结合谱加速的前后向迭代算法(PILE+FB-SA)计算一维粗糙面下方埋藏金属目标的后向散射;用得到的后向散射数据结合后向投影算法实现二维SAR(synthetic aperture radar)成像,研究窗函数的选取,讨论目标位置及尺寸大小变化的影响.用具有高斯谱的粗糙面模拟实际地表面,并采用锥形波入射以减小人为截断粗糙面引起的边缘效应.由于散射数据由快速数值算法得到,该算法不受地面和目标参数限制,可以实现任意粗糙地表面和复杂目标成像,对地下目标探测具有重要的应用价值.

关键词: SAR成像, 地下埋藏目标探测, 粗糙地表面, 层内波传播算法

Abstract: A fast radar imaging method for a buried object is presented.At first,backscatter data is computed with propagation. inside-layer expansion combining forward and backward method with spectral acceleration(PILE+FB.SA).Then,a conventional synthetic aperture radar(SAR)imaging procedure called back projection method is used to generate 2-D images.The choice of window functions is studied.A random rough surface with Gauss spectrum is used to simulate the ground.A tapered incident wave is chosen to reduce truncation errors.This method is proper for rough surface with any parameters with buried complex object.It is useful in realistic object detecting.

Key words: SAR imaging, detecting of buried object, rough surface, propagation-inside-layer expansion(PILE)

中图分类号:

TM152
TM153

姬伟杰, 童创明. 一维粗糙地表面下方埋藏目标SAR成像[J]. 计算物理, 2012, 29(5): 745-752.

JI Weijie, TONG Chuangming. SAR Imaging of One-dimensional Rough Surface with a Buried Object[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2012, 29(5): 745-752.