一种交替发射模式的机载MIMO-SAR下视三维成像方法

doi:10.3969/j.issn.1001-2400.2013.03.023

J4 ›› 2013, Vol. 40 ›› Issue (3): 152-159.doi: 10.3969/j.issn.1001-2400.2013.03.023

一种交替发射模式的机载MIMO-SAR下视三维成像方法

黄旭华^1,3;李项军²;方逸洪¹

(1. 空军工程大学防空反导学院，陕西西安 710000；
2. 中国人民解放军93942部队，陕西咸阳 712000;
3. 中国人民解放军95037部队，湖北武汉 430073)

收稿日期:2012-01-09 出版日期:2013-06-20 发布日期:2013-07-29
通讯作者: 黄旭华
作者简介:黄旭华(1980-)，女，空军工程大学博士研究生，E-mail: huangxuhua_101@163.com．
基金资助:
国家自然科学基金资助项目(60971100)

Imaging method of airborne downward-looking 3D-MIMO-SAR with alternate-transmitting mode

HUANG Xuhua^1,3;LI Xiangjun²;FANG Yihong¹

(1. The Institute of Air Defense and Anti-missile, Air Force Engineering Univ., Xi'an 710000， China;
2. Unit 93942 of PLA, Xianyang 712000， China;
3. Unit 95037 of PLA, Wuhan 430073， China)

Received:2012-01-09 Online:2013-06-20 Published:2013-07-29
Contact: HUANG Xuhua

摘要/Abstract

摘要：

对阵列天线合成孔径雷达三维成像问题进行了研究．针对传统单发模式下视三维合成孔径雷达成像所需天线阵元多、空间利用率低的问题，提出了一种基于交替发射模式的多输入多输出合成孔径雷达下视三维成像方法．首先分析了交替发射模式下的下视三维合成孔径雷达回波信号模型，其次结合等效相位中心原理和波束形成技术给出了机载多输入多输出合成孔径雷达下视三维成像方法．该方法可以大幅减少天线阵元的数目，提高雷达平台的空间利用率，有效降低工程实现难度．

关键词: 多输入多输出雷达, 合成孔径雷达成像, 下视三维成像, 等效相位中心

Abstract:

By study of the problem of three-dimensional (3D) imaging method of linear arrays synthetic aperture radar (LA-SAR), the conventional LA-SAR with a single transmitting antenna requires a number of receiving antennas to meet the requirement of the spatial sampling rate, which is difficult to implement. To solve the problem, a novel imaging method of down-looking 3D-MIMO-SAR based on the alternate-transmitting mode is proposed. Firstly, the 3-D echo signal model based on the alternate transmitting mode is analyzed. Then by combining equivalent phase center theory and beam-forming technology, the imaging method of downward-looking 3D-MIMO-SAR is put forward in detail, which can cut down the number of antennas significantly, improve the spatial efficiency of the radar platform and reduce the difficulty of project implementation. Finally, the effectiveness of this algorithm is validated by the simulation results.

Key words: multy input multy output radar, synthetic aperture radar imaging, downward-looking 3-D imaging, equivalent phase center

中图分类号:

TN957

黄旭华;李项军;方逸洪. 一种交替发射模式的机载MIMO-SAR下视三维成像方法[J]. J4, 2013, 40(3): 152-159.

HUANG Xuhua;LI Xiangjun;FANG Yihong. Imaging method of airborne downward-looking 3D-MIMO-SAR with alternate-transmitting mode[J]. J4, 2013, 40(3): 152-159.

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一种交替发射模式的机载MIMO-SAR下视三维成像方法

Imaging method of airborne downward-looking 3D-MIMO-SAR with alternate-transmitting mode

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