本文選題：雙基地MIMO雷達(dá) + 實驗系統(tǒng)�。� 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：雙/多基地雷達(dá)采用收發(fā)分置的布陣方式,在現(xiàn)代電子戰(zhàn)中表現(xiàn)出巨大的潛在優(yōu)勢;而集中式MIMO雷達(dá)通過發(fā)射相互正交的信號,極大提高了目標(biāo)檢測和參數(shù)估計等方面的能力。本文討論的雙基地MIMO雷達(dá),將兩者有機(jī)的結(jié)合起來,展示出更優(yōu)良的性能和潛力;同時,由于其與現(xiàn)代雷達(dá)具有相似的系統(tǒng)結(jié)構(gòu),實用化顯得更便捷。本文基于一套T/R-R體制的雙基地MIMO雷達(dá)硬件實驗系統(tǒng),采用理論分析與實驗研究相結(jié)合的方法,開展了該系統(tǒng)的模塊調(diào)試、系統(tǒng)校正、功能測試和算法驗證等工作,從而確保硬件系統(tǒng)在有效的控制邏輯下正常、穩(wěn)定的工作;通過制定合理的外場實驗方案,開展了一系列外場測試與實驗,驗證了MIMO雷達(dá)的性能特點及其目標(biāo)探測能力等。具體工作內(nèi)容包括以下幾點:1、介紹了雙基地MIMO雷達(dá)的基本原理和信號處理框架,以及幾種目標(biāo)信息提取的常用算法;討論了發(fā)射信號非嚴(yán)格正交性對和差比幅單脈沖測角性能的影響,并提出了一種校正方法,可有效消除該影響。2、介紹了實驗系統(tǒng)的邏輯結(jié)構(gòu)、模塊功能、工作流程和主要參數(shù),完成了信號產(chǎn)生模塊的功能測試;采用實測數(shù)據(jù)驗證了發(fā)射信號分離的有效性,并對MIMO發(fā)射信號的正交性進(jìn)行了實驗驗證。3、建立了收發(fā)陣列幅相誤差、收發(fā)站間的頻率差和相位差幾種非理想因素下的信號模型,分析了非理想因素對信號處理算法的影響;采用有源校正技術(shù)實現(xiàn)了收發(fā)陣列幅相誤差的校正,并利用MUSIC角度估計效果驗證了該方法的有效性;借助于MTD處理方法實現(xiàn)了收發(fā)站間頻率差的估計。同時,在校正方法成熟的基礎(chǔ)上,制定了合理的實驗方案,完成了實驗系統(tǒng)發(fā)射方向圖的繪制,驗證了MIMO雷達(dá)等效發(fā)射波束形成原理,并通過遠(yuǎn)場信號采集與功率估計,驗證了MIMO雷達(dá)的抗截獲性能。4、為驗證實驗系統(tǒng)的目標(biāo)檢測功能,設(shè)計了合理的實驗方法和實驗場景,開展了MIMO雷達(dá)動目標(biāo)檢測實驗;為改善目標(biāo)檢測效果,采用CLEAN算法實現(xiàn)了固定雜波的有效對消,該方法相比傳統(tǒng)MTI方法,性能更優(yōu);此外,還開展了多目標(biāo)檢測實驗,驗證了MIMO雷達(dá)的多目標(biāo)檢測能力。
[Abstract]:The bistatic / multistatic radar has a great potential advantage in modern electronic warfare by using a transceiver and transceiver array, while the centralized MIMO radar can greatly improve the ability of target detection and parameter estimation by transmitting mutually orthogonal signals. The bistatic MIMO radar, which is discussed in this paper, combines both of them organically and shows better performance and potential. At the same time, because of its similar system structure with modern radar, the bistatic MIMO radar becomes more practical and convenient. Based on a bistatic MIMO radar hardware experimental system based on T/R-R system, this paper uses the method of combining theoretical analysis with experimental research to carry out the module debugging, system correction, function test and algorithm verification of the system. In order to ensure that the hardware system works normally and stably under effective control logic, a series of external field tests and experiments are carried out to verify the performance of MIMO radar and its target detection ability. The specific work includes the following points: 1, introduces the basic principle and signal processing framework of bistatic MIMO radar, as well as several common algorithms of target information extraction; This paper discusses the influence of non-strict orthogonality of transmitted signal on the angle measurement performance of sum difference ratio amplitude monopulse, and puts forward a correction method, which can effectively eliminate this influence. The logical structure, module function, work flow and main parameters of the experimental system are introduced. The functional test of the signal generation module is completed, the validity of the transmission signal separation is verified by the measured data, and the orthogonality of the MIMO transmission signal is verified experimentally. 3, and the amplitude and phase error of the transceiver array is established. The signal models of frequency difference and phase difference between transceiver stations are analyzed, the influence of non-ideal factors on signal processing algorithm is analyzed, and the amplitude and phase error correction of transceiver array is realized by using active correction technology. The effectiveness of this method is verified by MUSIC angle estimation, and the frequency difference between transceiver stations is estimated by MTD processing method. At the same time, on the basis of the mature correction method, a reasonable experimental scheme is established, and the transmission pattern of the experimental system is drawn up. The principle of equivalent beamforming of MIMO radar is verified, and the far-field signal acquisition and power estimation are carried out. The anti-interception performance of MIMO radar is verified. In order to verify the target detection function of the experimental system, a reasonable experimental method and experimental scene are designed, the moving target detection experiment of MIMO radar is carried out, and the effect of target detection is improved. The CLEAN algorithm is used to realize the efficient cancellation of fixed clutter, and the performance of this method is better than that of the traditional MTI method. In addition, the multi-target detection experiment is carried out to verify the multi-target detection ability of MIMO radar.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN957.51

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本文編號：1778095