本文選題：環(huán)掃SAR成像　切入點：線性距離—多普勒算法　出處：《南京航空航天大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：環(huán)視合成孔徑雷達(dá)主要用于在導(dǎo)彈精確末制導(dǎo)中進(jìn)行景象匹配,而雷達(dá)的運動參數(shù)是實現(xiàn)精確制導(dǎo)的關(guān)鍵因素之一。雷達(dá)運動參數(shù)可以由GPS和IMU直接測得,也可以通過從實測數(shù)據(jù)中估計得出。由于環(huán)掃SAR雷達(dá)平臺具有運動速度快、非勻速運動和大斜視等特點,因此對成像質(zhì)量要求比較高。而現(xiàn)有GPS和IMU測得的雷達(dá)運動參數(shù)一般很難滿足成像精度要求。本文研究基于雷達(dá)回波數(shù)據(jù)的運動參數(shù)估計方法,通過利用多普勒參數(shù)估計和圖像匹配等技術(shù)對運動參數(shù)進(jìn)行精確估計,以適應(yīng)環(huán)掃SAR高分辨率成像和精確制導(dǎo)的要求。本文的主要思路如下:第一章緒論回顧了SAR的發(fā)展歷史,介紹了國內(nèi)外在SAR領(lǐng)域的發(fā)展情況,介紹本文研究內(nèi)容“環(huán)掃SAR成像及環(huán)掃SAR參數(shù)估計”的背景并且簡要說明本文的主要工作。第二章詳細(xì)介紹一種經(jīng)典的大斜視SAR成像算法,即線性距離-多普勒算法,這是本文環(huán)視SAR成像處理的基礎(chǔ)。第三章提出了一種基于多普勒中心估計的雷達(dá)運動參數(shù)估計方法,并分析了該方法在不同條件下的參數(shù)估計性能。第四章提出了一種基于SAR圖像匹配技術(shù)的雷達(dá)運動參數(shù)估計方法,并且對該方法進(jìn)行了誤差分析和性能評估。第五章結(jié)束語對全文的工作進(jìn)行了總結(jié),并指出了下一步需要繼續(xù)研究的問題。
[Abstract]:The synthetic Aperture Radar (SAR) is mainly used for scene matching in missile precision terminal guidance, and the radar motion parameters are one of the key factors to achieve precision guidance. The radar motion parameters can be directly measured by GPS and IMU. It can also be estimated from the measured data. Because the SAR radar platform has the characteristics of fast motion, non-uniform motion and large squint, etc. Therefore, the imaging quality is very high. However, the existing radar motion parameters measured by GPS and IMU are difficult to meet the requirements of imaging accuracy. In this paper, a method for estimating radar motion parameters based on radar echo data is studied. By using Doppler parameter estimation and image matching techniques, the motion parameters are accurately estimated to meet the requirements of high-resolution imaging and precision guidance of ring-scan SAR. The main ideas of this paper are as follows: in Chapter one, the history of SAR is reviewed. This paper introduces the development of SAR at home and abroad, introduces the background of the research content of this paper, "ring scan SAR imaging and ring scan SAR parameter estimation", and briefly explains the main work of this paper. Chapter 2 introduces a classical large squint SAR imaging algorithm in detail. That is, linear range-Doppler algorithm, which is the basis of SAR imaging processing in this paper. In chapter 3, a method for estimating radar motion parameters based on Doppler center estimation is proposed. In chapter 4th, a radar motion parameter estimation method based on SAR image matching technique is proposed. The error analysis and performance evaluation of the method are also given. The conclusion of chapter 5th summarizes the work of the paper and points out the problems that need to be further studied in the next step.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN957.52

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相關(guān)期刊論文 前1條

1 朱振波;陳風(fēng)波;湯子躍;;一種基于Radon變換的SAR多普勒參數(shù)估計方法[J];武漢理工大學(xué)學(xué)報(交通科學(xué)與工程版);2011年01期

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本文編號：1608493