高分辨率滑动聚束SAR BP成像及其异构并行实现

唐江文; 邓云凯; 王宇; 赵硕; 李宁

doi:10.12000/JR16053

高分辨率滑动聚束SAR BP成像及其异构并行实现

DOI: 10.12000/JR16053

1.
(中国科学院电子学研究所北京 100190)
2.
(中国科学院大学北京 100049)

基金项目:

国家自然科学基金（61172122），中国科学院百人计划（61422113）

详细信息

作者简介:
唐江文(1988-),男,籍贯山东聊城,本科毕业于中国科学技术大学,现于中国科学院电子学研究所攻读博士学位,主要研究方向为合成孔径雷达时域成像算法以及大规模并行计算。E-mail:jiangwen@mail.ustc.edu.cn;邓云凯(1962-),男,研究员,博士生导师,研究方向为星载SAR系统设计、成像及微波遥感理论;王宇(1979-),男,研究员,博士生导师,研究方向为星载SAR系统设计及信号处理。

通讯作者:
李宁,lining_nuaa@163.com

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- 被引次数: 0
出版历程
- 收稿日期: 2016-03-09
- 修回日期: 2016-05-04
- 网络出版日期: 2017-08-28

High-resolution Slide Spotlight SAR Imaging by BP Algorithm and Heterogeneous Parallel Implementation

1.
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
2.
(University of Chinese Academy of Sciences, Beijing 100049, China)

Funds:

The National Natural Science Foundation of China (61172122), One Hundred Person Project of the Chinese Academy of Sciences (61422113)

摘要

摘要: 当前高分辨率合成孔径雷达对成像算法以及计算能力都提出了巨大挑战，滑动聚束是实现高分辨率的一种重要模式，它能够同时兼顾高分辨率和方位向宽测绘带。在滑动聚束模式下，受轨道弯曲、调频率时变等影响，传统的频域成像算法的聚焦性能会下降，为突破这种局限性，该文采用BP（Back-Projection）算法进行精确成像，并针对BP算法O（N3）的高计算复杂度提出了一种基于CPU/GPU异构计算平台的高效并行算法，充分利用了计算机的计算资源，提高了成像效率，其中调度线程的设计，也提高了成像的灵活性。
- 合成孔径雷达 /
- 滑动聚束 /
- 后向投影算法 /
- 异构并行计算
Abstract: High-resolution synthetic aperture radar presents a significant challenge to imaging algorithms and computing power.Slide spotlight is an important mode that has both high resolution and wide azimuth swath. Generally,in the slide spotlight mode,the performance of conventional frequency domain imaging algorithms degrades because of orbit curvature,the time-variant azimuth chirp rate,and other factors.We adopt the Back-Projection (BP) algorithm in this study to counteract this limitation.We also propose a CPU/GPU heterogeneous BP algorithm to deal with the high computing complexity O (N3) of the BP algorithm.This heterogeneous BP algorithm makes full use of computing resources and accelerates imaging progress,and the design of a scheduling thread improves the flexibility of the algorithm.
- Synthetic Aperture Radar (SAR) /
- Slide spotlight /
- Back-Projection (BP) algorithm /
- Heterogeneous parallel computing

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参考文献(19)

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