發(fā)布時(shí)間：2018-06-28 09:50

  本文選題：認(rèn)知雷達(dá) + 發(fā)射方向圖��； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：認(rèn)知雷達(dá)能夠根據(jù)目標(biāo)和環(huán)境的特點(diǎn)自適應(yīng)地設(shè)計(jì)發(fā)射波形、選擇工作模式以及雷達(dá)接收機(jī)信號(hào)處理方式,并可以利用各種先驗(yàn)信息從而提高對(duì)目標(biāo)的檢測(cè)和跟蹤性能,是現(xiàn)代雷達(dá)技術(shù)發(fā)展的一個(gè)新趨勢(shì)。因此,近年來(lái)認(rèn)知雷達(dá)憑借其優(yōu)越性能受到學(xué)者的廣泛關(guān)注。認(rèn)知發(fā)射是認(rèn)知雷達(dá)區(qū)別于傳統(tǒng)雷達(dá)的根本特征,本文以多輸入多輸出MIMO雷達(dá)為載體,主要研究了面向多目標(biāo)跟蹤的認(rèn)知發(fā)射問(wèn)題,并設(shè)計(jì)了認(rèn)知雷達(dá)認(rèn)知發(fā)射綜合仿真軟件。本文的主要工作包括以下幾個(gè)方面:1.針對(duì)MIMO雷達(dá)的信號(hào)處理方法進(jìn)行了研究。首先分析了MIMO雷達(dá)信號(hào)模型以及兩種接收信號(hào)處理結(jié)構(gòu),然后分別介紹了基于遺傳算法和序列二次規(guī)劃算法的正交波形設(shè)計(jì)方法,針對(duì)多目標(biāo)環(huán)境介紹了最小旁瓣電平的發(fā)射方向圖設(shè)計(jì)方法和基于循環(huán)算法的發(fā)射波形設(shè)計(jì)方法。最后針對(duì)接收處理問(wèn)題,介紹了幾種常見(jiàn)的自適應(yīng)波束形成方法。2.研究了面向多目標(biāo)跟蹤的MIMO雷達(dá)認(rèn)知發(fā)射問(wèn)題。認(rèn)知發(fā)射問(wèn)題主要包括資源管理和和發(fā)射方向圖優(yōu)化設(shè)計(jì)兩方面。在資源管理方面,介紹了最小化最差預(yù)測(cè)貝葉斯克拉美羅界的優(yōu)化分配方法,通過(guò)實(shí)驗(yàn)對(duì)比發(fā)現(xiàn),經(jīng)過(guò)能量分配后的最差跟蹤性能比平均分配有很大提高。在發(fā)射方向圖優(yōu)化設(shè)計(jì)方面,介紹了多波束合成發(fā)射方向圖和基于序列二次規(guī)劃算法的波形設(shè)計(jì)方法,通過(guò)仿真實(shí)驗(yàn)表明,由序列二次規(guī)劃算法得到的波形具有良好的相關(guān)特性。3.介紹了基于Matlab和Visual Studio 2008的認(rèn)知雷達(dá)認(rèn)知發(fā)射綜合仿真軟件設(shè)計(jì)方法。首先介紹了軟件的運(yùn)行環(huán)境和開(kāi)發(fā)工具,然后介紹了軟件包含的三個(gè)模塊:1)場(chǎng)景生成模塊;2)算法仿真模塊;3)綜合仿真模塊。其中場(chǎng)景生成模塊的功能包括目標(biāo)、雷達(dá)及信號(hào)參數(shù)的設(shè)置、打印、保存和載入;算法仿真模塊包括發(fā)射方向圖設(shè)計(jì)、發(fā)射波形優(yōu)化設(shè)計(jì)以及接收波束形成等算法的仿真;綜合仿真模塊主要是根據(jù)設(shè)定的參數(shù)進(jìn)行綜合仿真并顯示結(jié)果,主要包括目標(biāo)運(yùn)動(dòng)軌跡及跟蹤精度圖的動(dòng)態(tài)繪制和能量分配結(jié)果的顯示。最后介紹了綜合仿真模塊中曲線繪制的方法以及對(duì)曲線的放大、移動(dòng)和復(fù)位操作。
[Abstract]:Cognitive radar can adaptively design the waveform according to the characteristics of the target and environment, select the working mode and the signal processing method of the radar receiver, and can use all kinds of prior information to improve the detection and tracking performance of the target. It is a new trend in the development of modern radar technology. Therefore, in recent years, cognitive radar has been widely concerned by scholars because of its superior performance. Cognitive transmission is the fundamental characteristic of cognitive radar, which is different from traditional radar. In this paper, the multi-input and multi-output MIMO radar is used as the carrier, the problem of multi-target tracking cognitive launch is mainly studied, and a cognitive radar cognitive emulation software is designed. The main work of this paper includes the following aspects: 1. The signal processing method of MIMO radar is studied. Firstly, the MIMO radar signal model and two received signal processing structures are analyzed, and then the orthogonal waveform design method based on genetic algorithm and sequential quadratic programming algorithm is introduced respectively. In this paper, the design method of minimum sidelobe level and the design method of transmitting waveform based on cyclic algorithm are introduced for multi-target environment. Finally, aiming at the problem of receiving and processing, several common adaptive beamforming methods. The problem of MIMO radar cognitive transmission for multi-target tracking is studied. Cognitive launch problem mainly includes two aspects: resource management and optimal design of launch pattern. In the aspect of resource management, the optimal allocation method for minimizing the worst prediction Bayesian Clamello bounds is introduced. The results of experiments show that the worst tracking performance after energy allocation is much better than the average allocation. In the aspect of the optimal design of the emission pattern, the multi-beam synthetic transmitting pattern and the waveform design method based on sequential quadratic programming algorithm are introduced. The simulation results show that, The waveform obtained from the sequential quadratic programming algorithm has good correlation characteristics. The design method of cognitive radar integrated simulation software based on Matlab and Visual Studio 2008 is introduced. This paper first introduces the running environment and development tools of the software, and then introduces three modules: 1) scene generation module, 2) algorithm simulation module and 3) integrated simulation module. The functions of scene generation module include the setting, printing, saving and loading of target, radar and signal parameters, and the algorithm simulation module includes the design of transmit pattern, the optimization design of transmitting waveform and the simulation of receiving beamforming algorithm. The synthetic simulation module mainly carries on the synthesis simulation according to the set parameter and displays the result, mainly includes the target motion track and the tracking precision chart dynamic drawing and the energy distribution result display. Finally, the method of curve drawing in synthetic simulation module and the operation of enlarging, moving and resetting the curve are introduced.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN957.51

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