本文關(guān)鍵詞：雷達(dá)對(duì)抗數(shù)字仿真系統(tǒng)　出處：《西安電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 雷達(dá)對(duì)抗 自衛(wèi)式干擾 效能評(píng)估 分布式仿真

【摘要】：雷達(dá)對(duì)抗數(shù)字仿真系統(tǒng)是一個(gè)相對(duì)復(fù)雜的系統(tǒng),對(duì)其建模仿真首先要進(jìn)行方案設(shè)計(jì),根據(jù)功能任務(wù)將整個(gè)仿真系統(tǒng)劃分為雷達(dá)仿真子系統(tǒng)、自衛(wèi)式干擾仿真子系統(tǒng)和效能評(píng)估仿真子系統(tǒng)。本文結(jié)合高層體系的軟件結(jié)構(gòu)的思想,采用分布式仿真的方式,在運(yùn)行支撐框架平臺(tái)上建立三個(gè)子系統(tǒng)聯(lián)邦成員。首先,自衛(wèi)式干擾子系統(tǒng)用來(lái)產(chǎn)生各種樣式的干擾�；谝龑�(dǎo)式、轉(zhuǎn)發(fā)式以及數(shù)字合成式系統(tǒng)結(jié)構(gòu),分別建立壓制性干擾和欺騙性干擾仿真模型,并給出相應(yīng)的仿真效果圖。其次,雷達(dá)仿真子系統(tǒng)主要完成抗干擾過(guò)程。雷達(dá)發(fā)射的電磁波,在環(huán)境中產(chǎn)生包含目標(biāo)信息、噪聲、雜波的回波信號(hào),然后與自衛(wèi)式干擾子系統(tǒng)產(chǎn)生的干擾信號(hào)疊加進(jìn)入到雷達(dá)接收機(jī)中,經(jīng)過(guò)復(fù)雜的信號(hào)處理模塊,一方面既要提高信噪比、另一方面又要抗干擾和雜波。該系統(tǒng)主要采用自適應(yīng)旁瓣對(duì)消、旁瓣消隱、前沿跟蹤等措施降低干擾幅度,再利用脈沖壓縮、相參積累以及恒虛警檢測(cè)等手段來(lái)提高信噪比與信雜比。對(duì)于機(jī)載雷達(dá)來(lái)說(shuō),地物雜波信號(hào)比較強(qiáng),不僅要有針對(duì)性的抗干擾,也需要采取合適的方法減小雜波對(duì)目標(biāo)檢測(cè)的影響,得到的探測(cè)信息經(jīng)數(shù)據(jù)處理,形成目標(biāo)航跡,同時(shí)把信息發(fā)送到顯控平臺(tái)中。最后,在自衛(wèi)式干擾和雷達(dá)子系統(tǒng)的基礎(chǔ)上,建立的效能評(píng)估子系統(tǒng)是衡量機(jī)載雷達(dá)的最重要的性能指標(biāo)�；谛茉u(píng)估基本估準(zhǔn),分別介紹了壓制式干擾和欺騙式干擾的評(píng)估方法,再結(jié)合層次分析法,提出了一個(gè)層次清晰分明、結(jié)構(gòu)相對(duì)完整的性能指標(biāo)體系,在仿真中通過(guò)計(jì)算這些指標(biāo),根據(jù)指標(biāo)定性或者定量評(píng)估雷達(dá)的作戰(zhàn)效能。本文建立的雷達(dá)對(duì)抗數(shù)字仿真系統(tǒng)主要用于電子干擾系統(tǒng)的方案優(yōu)化和技術(shù)改進(jìn),提高電子干擾系統(tǒng)針對(duì)不同對(duì)象的干擾能力,為雷達(dá)對(duì)抗裝備論證、新型干擾/抗干擾技術(shù)研究、干擾/抗干擾效能評(píng)估等提供一個(gè)通用的對(duì)抗仿真實(shí)驗(yàn)與研究平臺(tái)。
[Abstract]:The radar countermeasure digital simulation system is a relatively complex system. The first step is to design the scheme for modeling and simulation. According to the function task, the whole simulation system is divided into radar simulation subsystem. Self-defense jamming simulation subsystem and effectiveness evaluation simulation subsystem. First, the self-defense interference subsystem is used to generate various types of interference. Based on the guided, forward and digital composite system structure. The simulation models of suppression jamming and deceptive jamming are established, and the corresponding simulation results are given. Secondly, the radar simulation subsystem mainly completes the anti-jamming process. In the environment, the echo signal including target information, noise and clutter is generated, and then superimposed with the interference signal generated by the self-defense jamming subsystem into the radar receiver, through the complex signal processing module. On the one hand, the signal-to-noise ratio (SNR) should be improved, on the other hand, anti-jamming and clutter should be improved. The system mainly uses adaptive sidelobe cancellation, sidelobe blanking, front tracking and so on to reduce the interference amplitude, and then use pulse compression. Coherent accumulation and CFAR detection are used to improve signal-to-noise ratio (SNR) and signal-to-clutter ratio (SSRR). For airborne radar, ground clutter signal is relatively strong, not only for targeted anti-jamming. It is also necessary to take appropriate methods to reduce the influence of clutter on target detection. The detected information is processed by data to form the target track, and the information is sent to the display and control platform at the same time. Finally. Based on the self-defense jamming and radar subsystem, the effectiveness evaluation subsystem is the most important performance index to evaluate airborne radar. The evaluation methods of suppression jamming and deceptive jamming are introduced respectively. Then a clear hierarchy and relatively complete performance index system is put forward with the help of analytic hierarchy process (AHP). These indexes are calculated in the simulation. The radar combat effectiveness is evaluated qualitatively or quantitatively according to the target. The radar countermeasure digital simulation system is mainly used for the scheme optimization and technical improvement of the electronic jamming system. Improve the jamming ability of the electronic jamming system for different objects, for the demonstration of radar countermeasures equipment, a new jamming / anti-jamming technology research. Jamming / anti-jamming effectiveness evaluation provides a general platform for simulation experiments and research.
【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)】：TN974

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本文編號(hào)：1387175