【摘要】：頻率步進(jìn)雷達(dá)是一種重要的高分辨雷達(dá),該體制雷達(dá)有效解決了距離分辨力與系統(tǒng)硬件要求以及瞬時(shí)帶寬之間的矛盾,近些年來(lái)受到廣泛關(guān)注。ISAR成像技術(shù)可以有效獲取目標(biāo)較為直觀的二維圖像和尺寸信息,大大降低了目標(biāo)識(shí)別的難度,是目標(biāo)識(shí)別的一項(xiàng)重要手段。將頻率步進(jìn)雷達(dá)應(yīng)用于ISAR成像技術(shù),二者的優(yōu)勢(shì)結(jié)合,一方面可以降低二維成像對(duì)系統(tǒng)瞬時(shí)帶寬的要求,另一方面可以提高頻率步進(jìn)雷達(dá)的信息獲取能力。本文詳細(xì)梳理總結(jié)了單脈沖頻率步進(jìn)雷達(dá)ISAR成像的流程,并針對(duì)二者結(jié)合時(shí)產(chǎn)生的距離-多普勒耦合現(xiàn)象和橫向定標(biāo)方法進(jìn)行了具體研究,提出了雜波背景下的成像目標(biāo)篩選和基于單脈沖測(cè)角的橫向定標(biāo)算法。并分別使用仿真實(shí)驗(yàn)和實(shí)測(cè)數(shù)據(jù)對(duì)本文提出的成像流程和算法進(jìn)行了驗(yàn)證。論文分為三個(gè)部分:第1部分主要介紹了頻率步進(jìn)信號(hào)和ISAR成像技術(shù)的相關(guān)知識(shí)和原理,重點(diǎn)介紹了頻率步進(jìn)雷達(dá)高分辨距離像的獲取方法以及后文將重點(diǎn)使用的基于散射中心對(duì)齊的高分辨距離像抽取方法。第2部分針對(duì)頻率步進(jìn)信號(hào)應(yīng)用于ISAR成像時(shí)產(chǎn)生的距離-多普勒耦合現(xiàn)象進(jìn)行了具體研究,提出了利用頻率步進(jìn)信號(hào)的速度敏感性實(shí)現(xiàn)雜波背景多目標(biāo)場(chǎng)景下成像目標(biāo)的篩選,經(jīng)過(guò)高分辨距離像抽取、平動(dòng)補(bǔ)償以及橫向分辨得到感興趣目標(biāo)的高分辨二維像。并使用仿真實(shí)驗(yàn)和雷達(dá)外場(chǎng)實(shí)測(cè)數(shù)據(jù)對(duì)這一流程進(jìn)行了驗(yàn)證。第3部分針對(duì)單脈沖頻率步進(jìn)雷達(dá)ISAR成像的橫向定標(biāo)方法進(jìn)行了具體研究,提出了利用單脈沖測(cè)角技術(shù)測(cè)量目標(biāo)運(yùn)動(dòng)軌跡進(jìn)而對(duì)ISAR二維像橫向定標(biāo)的方法,進(jìn)而基于單脈沖頻率步進(jìn)雷達(dá)的三通道高分辨距離像提出了基于高分辨距離像的測(cè)角方法。并使用仿真實(shí)驗(yàn)和雷達(dá)外場(chǎng)實(shí)測(cè)數(shù)據(jù)對(duì)這一橫向定標(biāo)方法進(jìn)行了驗(yàn)證。
[Abstract]:Frequency stepping radar is an important high resolution radar, which effectively solves the contradiction between range resolution, hardware requirement and instantaneous bandwidth. In recent years, ISAR imaging technology can effectively obtain the two-dimensional image and size information of the target, which greatly reduces the difficulty of target recognition and is an important means of target recognition. The combination of the advantages of the frequency stepping radar and the ISAR imaging technology can reduce the requirement of the instantaneous bandwidth of the two-dimensional imaging system on the one hand, and improve the information acquisition ability of the frequency stepping radar on the other hand. In this paper, the ISAR imaging process of monopulse frequency stepping radar is summarized in detail, and the range-Doppler coupling phenomenon and lateral calibration method produced by the combination of them are studied in detail. The imaging target selection under clutter background and the lateral calibration algorithm based on monopulse angle measurement are proposed. Simulation experiments and measured data are used to verify the imaging flow and algorithm proposed in this paper. The thesis is divided into three parts: the first part mainly introduces the knowledge and principle of frequency stepping signal and ISAR imaging technology. This paper mainly introduces the method of obtaining high resolution range profile of frequency stepping radar and the high resolution range profile extraction method based on center alignment of scattering which will be used in the following paper. In the second part, the range-Doppler coupling phenomenon when frequency stepping signal is applied to ISAR imaging is studied in detail, and the velocity sensitivity of frequency stepping signal is used to screen the imaging target in clutter background multi-target scene. Through high resolution range profile extraction, translation compensation and lateral resolution, the high resolution two dimensional images of interested targets are obtained. Simulation experiments and radar field data are used to verify the flow. In the third part, the transverse calibration method for ISAR imaging of monopulse frequency stepping radar is studied in detail, and the method of measuring the moving trajectory of target by monopulse angle measurement technique and then the lateral calibration of ISAR two-dimensional image is put forward. Furthermore, an angle measurement method based on high resolution range profile is proposed based on the three-channel high resolution range profile of monopulse frequency stepping radar. The lateral calibration method is verified by simulation experiment and radar field measurement data.
【學(xué)位授予單位】：國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN957.52

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉開(kāi)元;周劍雄;朱永鋒;付強(qiáng);;基于多散射中心對(duì)齊的距離像抽取方法[J];雷達(dá)科學(xué)與技術(shù);2013年05期

2 周萬(wàn)幸;;ISAR成像系統(tǒng)與技術(shù)發(fā)展綜述[J];現(xiàn)代雷達(dá);2012年09期

3 葉春茂;許稼;彭應(yīng)寧;王秀壇;;逆合成孔徑雷達(dá)多普勒質(zhì)心跟蹤法性能分析[J];電子學(xué)報(bào);2009年06期

4 趙哲;許人燦;陳曾平;;峰度最大準(zhǔn)則ISAR成像快速包絡(luò)對(duì)齊方法[J];雷達(dá)科學(xué)與技術(shù);2007年06期

5 肖順平;魏建功;馮德軍;王雪松;;ISAR成像包絡(luò)對(duì)齊性能評(píng)估[J];國(guó)防科技大學(xué)學(xué)報(bào);2007年03期

6 張直中;;逆合成孔徑雷達(dá)(ISAR)成像[J];中國(guó)電子科學(xué)研究院學(xué)報(bào);2006年05期

7 蘇宏艷;龍騰;何佩琨;侯孝民;;運(yùn)動(dòng)目標(biāo)環(huán)境下的調(diào)頻步進(jìn)信號(hào)目標(biāo)抽取算法[J];電子與信息學(xué)報(bào);2006年05期

8 萬(wàn)天才;頻率合成器技術(shù)發(fā)展動(dòng)態(tài)[J];微電子學(xué);2004年04期

9 李海英,楊汝良;徑向速度對(duì)頻率步進(jìn)雷達(dá)目標(biāo)距離像影響分析[J];電子與信息學(xué)報(bào);2003年05期

10 石志廣,付強(qiáng);一種運(yùn)動(dòng)目標(biāo)距離象的速度補(bǔ)償方法[J];制導(dǎo)與引信;2002年03期

相關(guān)博士學(xué)位論文 前1條

1 高昭昭;高分辨ISAR成像新技術(shù)研究[D];西安電子科技大學(xué);2009年

相關(guān)碩士學(xué)位論文 前2條

1 呂少霞;ISAR成像的橫向定標(biāo)算法研究[D];哈爾濱工業(yè)大學(xué);2007年

2 劉毅;逆合成孔徑雷達(dá)的成像研究[D];南京理工大學(xué);2004年

，

本文編號(hào)：2431264