本文選題：分布式相控陣?yán)走_(dá) + 目標(biāo)定位��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：近年來,伴隨雷達(dá)對(duì)抗技術(shù)的發(fā)展,雷達(dá)面對(duì)的電磁環(huán)境越來越復(fù)雜,隱身技術(shù)、反輻射導(dǎo)彈、綜合電子干擾、低空突防技術(shù)也進(jìn)一步發(fā)展,傳統(tǒng)雷達(dá)已難以對(duì)付這些難題。分布式相控陣?yán)走_(dá)是在分布式雷達(dá)和相控陣?yán)走_(dá)的基礎(chǔ)上發(fā)展而來的新型雷達(dá),具有檢測(cè)范圍廣、檢測(cè)精度高、檢測(cè)弱小目標(biāo)等優(yōu)點(diǎn),對(duì)隱身技術(shù)和反輻射導(dǎo)彈有重要對(duì)抗作用。而目標(biāo)定位是雷達(dá)測(cè)量目標(biāo)參數(shù)中不可缺失的部分,也是檢測(cè)雷達(dá)性能的重要指標(biāo)。分布式相控陣?yán)走_(dá)目標(biāo)定位是分布式相控陣?yán)走_(dá)研究的重要組成之一。本論文以基于分布式相控陣?yán)走_(dá)的目標(biāo)定位技術(shù)為主要的研究對(duì)象,在深入分析雷達(dá)目標(biāo)定位的基本算法、基于分布式相控陣?yán)走_(dá)的系統(tǒng)構(gòu)成、基于其系統(tǒng)的目標(biāo)定位空間譜理論的基礎(chǔ)上,對(duì)目標(biāo)定位進(jìn)行了詳盡的討論和研究。主要內(nèi)容為:1.研究目標(biāo)定位的方法,針對(duì)分布式相控陣?yán)走_(dá)的目標(biāo)定位提出基于MUSIC算法的分布式MUSIC譜估計(jì)算法。該算法針對(duì)分布式相控陣?yán)走_(dá)多個(gè)相控陣?yán)走_(dá)站點(diǎn)的特殊結(jié)構(gòu),將各雷達(dá)站點(diǎn)接收信號(hào)的噪聲子空間及其對(duì)應(yīng)的流型矢量融合到同一譜函數(shù)中處理。該算法保持了MUSIC算法定位精度高的優(yōu)點(diǎn),而且能夠?qū)崿F(xiàn)多目標(biāo)自動(dòng)配對(duì),不會(huì)出現(xiàn)掃描線不能交于一點(diǎn)的情況,但該算法仍需對(duì)待測(cè)區(qū)域搜索譜峰的位置,計(jì)算量較大。2.研究雷達(dá)站點(diǎn)數(shù)目、站點(diǎn)拓?fù)浣Y(jié)構(gòu)對(duì)目標(biāo)定位的影響以及和其他雷達(dá)目標(biāo)定位比較。通過理論分析及仿真驗(yàn)證,接收信號(hào)的雷達(dá)站點(diǎn)至少三部才不會(huì)出現(xiàn)影響定位的模糊點(diǎn)。站點(diǎn)布陣形式、站點(diǎn)均勻和非均勻布陣以及布陣面積均對(duì)定位精度有影響,仿真驗(yàn)證其影響。在不同維度的空間中,比較分布式雷達(dá)基于時(shí)差定位、相控陣?yán)走_(dá)基于時(shí)差-測(cè)向聯(lián)合定位和分布式相控陣?yán)走_(dá)的分布式MUSIC譜估計(jì)算法定位的定位性能。3.研究雷達(dá)站點(diǎn)的重構(gòu)對(duì)目標(biāo)定位的影響。當(dāng)環(huán)境發(fā)生變化或雷達(dá)站點(diǎn)損壞時(shí)以致當(dāng)前設(shè)置下無法對(duì)待測(cè)區(qū)域目標(biāo)定位時(shí),需對(duì)雷達(dá)站點(diǎn)收發(fā)重構(gòu)后再對(duì)目標(biāo)定位。重構(gòu)分為對(duì)各站點(diǎn)接收和發(fā)射信號(hào)重構(gòu)和某個(gè)或某些站點(diǎn)損毀后對(duì)剩余站點(diǎn)的重構(gòu),重構(gòu)后仍可以實(shí)現(xiàn)目標(biāo)定位,仿真驗(yàn)證了該理論的正確性。
[Abstract]:In recent years, with the development of radar countermeasure technology, radar is facing more and more complex electromagnetic environment, stealth technology, anti-radiation missile, integrated electronic jamming, low-altitude penetration technology is also further developed, traditional radar has been difficult to deal with these problems. Distributed phased array radar is a new type of radar developed on the basis of distributed radar and phased array radar. It has important antagonism to stealth technology and anti-radiation missile. Target location is not only an indispensable part of radar measurement parameters, but also an important index to detect radar performance. Target location of distributed phased array radar is one of the important components of distributed phased array radar research. In this paper, the target location technology based on distributed phased array radar is taken as the main research object, and the basic algorithm of radar target location is analyzed in depth, and the system structure of distributed phased array radar is analyzed. Based on the spatial spectrum theory of target location, the target location is discussed and studied in detail. The main content is: 1. The method of target location is studied and a distributed music spectrum estimation algorithm based on music algorithm is proposed for the target location of distributed phased array radar. Aiming at the special structure of multiple phased array radar stations in distributed phased array radar, the noise subspace of each radar station and its corresponding flow pattern vector are fused into the same spectral function. The algorithm maintains the advantages of high localization accuracy of music algorithm, and can realize multi-target automatic pairing without the scan line not crossing one point. However, the algorithm still needs to deal with the location of the peak of search spectrum in the measured region, and the calculation amount is much. 2. The number of radar stations, the influence of site topology on target location and the comparison with other radar target location are studied. Through theoretical analysis and simulation, at least three radar stations receiving the signal will not appear fuzzy points that affect the location. The location accuracy is affected by the form of the station array, the uniform and non-uniform array of stations and the area of the array, which is verified by simulation. In the space of different dimensions, the localization performance of distributed music spectrum estimation algorithm is compared between distributed radar based on time difference localization, phased array radar based on combined time difference and direction finding and distributed phased array radar with distributed music spectrum estimation algorithm. The effect of radar station reconstruction on target location is studied. When the environment changes or the radar station is damaged, it is necessary to reconstruct the radar station and then locate the target after it is unable to deal with the target location of the measured area under the current setting. The reconstruction can be divided into the reconstruction of the received and transmitted signals of each station and the reconstruction of the remaining sites after one or some stations are destroyed. After the reconstruction, the target location can still be realized. The simulation results show that the theory is correct.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN958.92

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本文編號(hào)：2117565