【摘要】：隨著社會發(fā)展和科技的進步,雷達無論是在軍事領(lǐng)域還是日常生活中都有著廣闊的應(yīng)用前景,從戰(zhàn)爭角度剖析,我們對雷達的要求是能夠及時、有效地處理目標回波信號,從而實現(xiàn)對大批量運動目標的實時、有效搜索與跟蹤,即要對回波信號進行合理的處理,提取出我們需要的目標參數(shù),抑制掉我們不需要的雜波干擾信息,以實現(xiàn)引導火炮,導彈等武器對目標實施攻擊。因此,雷達系統(tǒng)能否在復(fù)雜的電磁環(huán)境中發(fā)揮應(yīng)有的效能,已經(jīng)成為軍民用電子設(shè)備的一個亟須解決的問題。在雷達接收的回波信號當中,除了目標信號,往往還存在各式各樣的雜波干擾信號,各種地物、云雨、海浪及敵人施放的金屬絲干擾等雜波常常和目標信號相伴存在,提取相關(guān)參數(shù),抑制雜波干擾成為首要問題。在抑制雜波中,如何有效的解“盲速”達到抑制雜波信號提高檢測能力就成為一項核心任務(wù),針對這一問題,給出了參差MTI濾波器的設(shè)計與實現(xiàn)方法。針對此,本論文開展了如下工作:首先介紹雷達雜波類型以及雜波特性,接著介紹雜波抑制常用方法,并給出了“盲速”問題的模型,然后介紹了幾種解“盲速”的參差碼優(yōu)化算法,其中重點介紹了用遺傳算法來完成參差碼尋優(yōu)的過程,利用尋優(yōu)所得的參差碼進行參差MTI設(shè)計,達到解“盲速”及雜波抑制的目的,在該算法下,通過不同條件進行濾波器設(shè)計,對單雜波及多雜波情況下進行雜波抑制和目標檢測。并通過算法仿真,對所介紹方法進行了性能分析。最后結(jié)合某雷達信號處理系統(tǒng)硬件平臺,介紹了雷達信號處理硬件平臺的結(jié)構(gòu)和組成,以及算法實現(xiàn)方案,給出了參差MTI中的AMTI濾波器在單雜波和多雜波情況下,實現(xiàn)對雜波抑制的方法。并重點介紹了系統(tǒng)中通訊控制器的軟件設(shè)計及功能實現(xiàn),最后通過硬件的平臺搭建和硬件程序的調(diào)試,實現(xiàn)了參差MTI中的AMTI濾波器對單雜波和多雜波的抑制功能。
[Abstract]:With the development of society and the progress of science and technology, radar has a broad application prospect in military field and daily life. From the angle of war, our requirement for radar is to be able to deal with the target echo signal in time and effectively. In order to realize the real-time, effective search and tracking of mass moving targets, that is, to process the echo signal reasonably, to extract the target parameters that we need, and to suppress the clutter interference information that we do not need, so as to guide the artillery. Missiles and other weapons attack targets. Therefore, whether the radar system can play its due effect in the complex electromagnetic environment has become an urgent problem for military and civilian electronic equipment. Among the echo signals received by radar, in addition to the target signal, there are often all kinds of clutter jamming signals. Clutter such as various ground objects, clouds and rain, waves and metal wire interference from the enemy often accompany the target signal. The most important problem is to extract the relevant parameters and suppress clutter interference. In the suppression of clutter, how to solve the blind velocity effectively to improve the detection ability of clutter suppression signal becomes a core task. In view of this problem, the design and implementation method of staggered MTI filter is presented. In this paper, the following works are carried out: firstly, the types and characteristics of radar clutter are introduced, then the common methods of clutter suppression are introduced, and the model of "blind velocity" problem is given. Then, this paper introduces several optimization algorithms of staggered codes for "blind speed", in which genetic algorithm is used to complete the optimization of staggered codes, and the staggered MTI is designed by using the staggered codes obtained by optimization. To solve the problem of blind velocity and clutter suppression, the filter is designed under different conditions for clutter suppression and target detection in the case of single clutter and multiple clutter. And through the algorithm simulation, the performance of the introduced method is analyzed. Finally, combined with the hardware platform of a radar signal processing system, the structure and composition of radar signal processing hardware platform and the algorithm implementation scheme are introduced. The AMTI filter in staggered MTI is given in the case of single clutter and multiple clutter. The method of clutter suppression is realized. The software design and function realization of the communication controller in the system are emphatically introduced. Finally, the suppression function of AMTI filter in staggered MTI to single clutter and multi-clutter is realized through hardware platform construction and hardware program debugging.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN957.51

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