【摘要】：在雷達系統(tǒng)中雷達信號處理占有至關(guān)重要的地位,現(xiàn)代雷達工作環(huán)境日益復(fù)雜,這對雷達信號處理系統(tǒng)提出了更高要求。衡量雷達好壞的一個重要指標是雜波抑制性能,雜波抑制對雷達來說至關(guān)重要。本文首先通過介紹雷達信號處理的發(fā)展現(xiàn)狀,進而對雷達發(fā)射信號、回波信號及雜波特性分別進行分析,了解雷達信號處理的目的。針對回波信號的雜波抑制技術(shù),分析了動目標顯示(MTI)、動目標檢測(MTD)以及脈沖多普勒(PD),還有雜波圖檢測技術(shù)和恒虛警檢測(CFAR)技術(shù)。在仿真軟件matlab中進行算法驗證并分析結(jié)果。結(jié)合雷達信號處理的技術(shù)特點和發(fā)展趨勢,設(shè)計雷達信號處理流程,研究雷達信號處理技術(shù)算法的工程實現(xiàn)。設(shè)計了模數(shù)轉(zhuǎn)換電路、以EMIFA和PCI總線作為數(shù)據(jù)傳輸通道以及電源模塊,以DSP和FPGA相結(jié)合為主的雷達信號處理模塊硬件平臺的處理系統(tǒng)。通過基于matlab的軟件CCSLink進行目標回波仿真設(shè)計,自動生成可在DSP上執(zhí)行的代碼,最后通過軟件進行算法的設(shè)計編程,針對雷達回波信號的雜波抑制算法進行仿真驗證。對比matlab仿真結(jié)果和硬件平臺的仿真結(jié)果,表明所設(shè)計的雷達信號處理硬件系統(tǒng)完全能夠?qū)崿F(xiàn)雜波抑制,得到較好的效果。
[Abstract]:Radar signal processing plays an important role in radar system, and the working environment of modern radar is becoming more and more complex, which puts forward higher requirements for radar signal processing system. Clutter suppression is an important index to measure radar performance. Clutter suppression is very important to radar. In this paper, the development of radar signal processing is introduced, and then the characteristics of radar signal, echo signal and clutter are analyzed respectively to understand the purpose of radar signal processing. Aiming at clutter suppression of echo signal, moving target display (MTI), moving target detection (MTD), pulse Doppler (PD), clutter detection and constant false alarm detection (CFAR) are analyzed. The algorithm is validated and the results are analyzed in the simulation software matlab. According to the technical characteristics and development trend of radar signal processing, the flow chart of radar signal processing is designed, and the engineering realization of radar signal processing algorithm is studied. In this paper, A / D conversion circuit is designed. EMIFA and PCI bus are used as data transmission channel and power supply module. The hardware platform of radar signal processing module is mainly composed of DSP and FPGA. The target echo simulation design based on matlab software CCSLink is carried out, and the code that can be executed on matlab is generated automatically. Finally, the algorithm is designed and programmed by the software, and the clutter suppression algorithm of radar echo signal is simulated and verified. Compared with the simulation results of matlab and hardware platform, it is shown that the designed radar signal processing hardware system can completely achieve clutter suppression and obtain better results.
【學(xué)位授予單位】：長春理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN957.51
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本文編號：2128891