【摘要】：MIMO雷達(dá)發(fā)射相互正交的信號(hào),通過(guò)形成低增益的寬波束可實(shí)現(xiàn)空域的快速覆蓋,并能夠改善傳統(tǒng)相控陣?yán)走_(dá)的抗截獲性能,及解決強(qiáng)雜波背景下接收弱目標(biāo)信號(hào)導(dǎo)致的動(dòng)態(tài)范圍過(guò)大等問(wèn)題;雙基地雷達(dá)具有收發(fā)分置的特點(diǎn),在抗隱形目標(biāo)、防低空入侵、抗干擾等諸多方面具備明顯的優(yōu)勢(shì)和潛力。因此,綜合了MIMO雷達(dá)與雙基地雷達(dá)兩者優(yōu)點(diǎn)的雙基地MIMO雷達(dá)應(yīng)運(yùn)而生。本文研究雙基地MIMO雷達(dá)目標(biāo)跟蹤技術(shù),通過(guò)系統(tǒng)建模與分析,提出了適用于雙基地MIMO雷達(dá)的目標(biāo)量測(cè)信息提取方法及目標(biāo)跟蹤方法;構(gòu)建了一個(gè)包含回波模擬、信號(hào)處理、數(shù)據(jù)處理等功能的較完整的雙基地MIMO雷達(dá)系統(tǒng)仿真平臺(tái),通過(guò)仿真驗(yàn)證了所提方法的有效性及雙基地MIMO雷達(dá)良好的目標(biāo)定位與跟蹤性能。具體內(nèi)容描述如下:(1)介紹了雷達(dá)數(shù)據(jù)處理系統(tǒng)常用的估計(jì)方法、機(jī)動(dòng)模型與跟蹤濾波器等的基本概念,并給出了具體的公式推導(dǎo)及適用條件。(2)根據(jù)雙基地MIMO雷達(dá)的系統(tǒng)模型和信號(hào)模型,研究了系統(tǒng)量測(cè)信息的獲取方法,給出了距離和、接收角、發(fā)射角三種殘差提取的詳細(xì)推導(dǎo)和具體計(jì)算流程,所用方法能快速有效的獲得系統(tǒng)量測(cè)信息,供后續(xù)目標(biāo)跟蹤處理使用。(3)研究了雙基地MIMO雷達(dá)目標(biāo)跟蹤技術(shù),采用泰勒展開與線性近似,解決了量測(cè)參數(shù)與目標(biāo)位置參數(shù)的非線性關(guān)系問(wèn)題;在此基礎(chǔ)上,提出了一種基于最小二乘估計(jì)與卡爾曼濾波相結(jié)合的目標(biāo)跟蹤方法,該方法能有效解決雙基地MIMO雷達(dá)量測(cè)信息的冗余性問(wèn)題。通過(guò)對(duì)比仿真,驗(yàn)證了所提方法的有效性及其相對(duì)于相控陣?yán)走_(dá)更好的目標(biāo)跟蹤性能。(4)建立了雙基地MIMO雷達(dá)系統(tǒng)仿真平臺(tái),該平臺(tái)包含完整的回波模擬、信號(hào)處理及數(shù)據(jù)處理過(guò)程;通過(guò)系統(tǒng)綜合仿真,驗(yàn)證了所提數(shù)據(jù)處理方法的可行性及雙基MIMO雷達(dá)目標(biāo)定位與跟蹤的有效性。同時(shí),也對(duì)影響雙基地MIMO雷達(dá)定位精度的一些因素進(jìn)行了討論和分析。
[Abstract]:The MIMO radar transmits mutually orthogonal signals. By forming a wide beam with low gain, the fast spatial coverage can be achieved and the anti-interception performance of the traditional phased array radar can be improved. And solve the problem of too large dynamic range caused by receiving weak target signal in the background of strong clutter. Bistatic radar (bistatic radar) has obvious advantages and potential in many aspects such as anti-stealth target anti-low-altitude intrusion anti-jamming and so on. Therefore, bistatic MIMO radar, which combines the advantages of MIMO radar and bistatic radar, emerges as the times require. In this paper, the bistatic MIMO radar target tracking technology is studied. Through the system modeling and analysis, the target measurement information extraction method and the target tracking method suitable for bistatic MIMO radar are presented. A relatively complete bistatic MIMO radar system simulation platform including echo simulation, signal processing, data processing and other functions is constructed. The effectiveness of the proposed method and the good target location and tracking performance of bistatic MIMO radar are verified by simulation. The main contents are as follows: (1) the basic concepts of radar data processing system, such as estimation method, maneuvering model and tracking filter, are introduced. According to the system model and signal model of bistatic MIMO radar, the method of obtaining the measurement information of the system is studied, and the range sum and receiving angle are given. The detailed derivation and calculation flow of the three kinds of residual extraction of the launch angle can obtain the measurement information of the system quickly and effectively for the follow-up target tracking processing. (3) the bistatic MIMO radar target tracking technology is studied. The nonlinear relationship between measurement parameters and target position parameters is solved by Taylor expansion and linear approximation. On this basis, a target tracking method based on the combination of least squares estimation and Kalman filter is proposed. This method can effectively solve the redundancy problem of bistatic MIMO radar measurement information. The validity of the proposed method and its better target tracking performance compared with phased array radar are verified by comparative simulation. (4) A bistatic MIMO radar system simulation platform is established, which contains complete echo simulation. Signal processing and data processing; The feasibility of the proposed data processing method and the effectiveness of target location and tracking for bistatic MIMO radar are verified by system simulation. At the same time, some factors affecting the positioning accuracy of bistatic MIMO radar are discussed and analyzed.
【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)】：TN953

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本文編號(hào)：2431308