本文選題：模糊函數(shù)　切入點：數(shù)字正交采樣　出處：《安徽理工大學》2016年碩士論文　論文類型：學位論文

【摘要】：脈沖多普勒(PD)雷達,它利用了多普勒效應原理,既具備脈沖雷達的測距性能,又具備多普勒雷達的測速性能,同時對雜波的抑制能力也比較突出,是一種重要的全相參體制的雷達。雷達信號處理是雷達技術(shù)發(fā)展的核心內(nèi)容,它主要包含了以下幾個方面的技術(shù)內(nèi)容,如信號選擇、正交采樣技術(shù)、脈沖壓縮技術(shù)、動目標檢測技術(shù)和恒虛警檢測技術(shù)等。雷達信號處理的仿真研究具有靈活、方便、快速、經(jīng)濟等特點,對于雷達技術(shù)的研究發(fā)展具有重要意義。論文首先分析了脈沖多普勒雷達的距離和速度的檢測原理,對PD雷達的模糊函數(shù)的含義和性質(zhì)進行了研究,分析了幾種不同信號所對應的模糊函數(shù)并分別進行了仿真。以此為據(jù),選擇能夠獲得較高分辨率的波形設計方法。其次,根據(jù)雷達的檢測性能、分辨率以及測量精度等性能要求,以線性調(diào)頻(LFM)信號為主進行了研究,主要分析了線性調(diào)頻信號的特性。模擬目標回波信號,將其加入噪聲和雜波形成混合信號并對其進行脈沖壓縮、動目標檢測以及恒虛警處理。其中,脈沖壓縮部分,論文選擇采用相關(guān)處理器法實現(xiàn)。動目標檢測部分,論文選擇采用脈沖對消器級聯(lián)多普勒濾波器組來實現(xiàn)。恒虛警處理部分,論文選擇采用單元平均恒虛警檢測來實現(xiàn)。最后,論文給出了雷達信號處理系統(tǒng)框圖,建立目標函數(shù),對其進行相關(guān)處理并進行仿真。對仿真結(jié)果進行分析,驗證通過以上方法進行處理,能夠有效獲取目標的距離和速度信息,滿足精度要求。
[Abstract]:Pulse Doppler Radar (PDR), which utilizes the principle of Doppler effect, not only has the range performance of pulse radar, but also has the performance of velocity measurement of Doppler radar. At the same time, it has a remarkable ability to suppress clutter. Radar signal processing is the core of radar technology development. It mainly includes the following aspects, such as signal selection, quadrature sampling technology, pulse compression technology, radar signal processing, radar signal processing is the core of radar technology development, it mainly includes the following aspects of the technical content, such as signal selection, quadrature sampling technology, pulse compression technology, Moving target detection technology and CFAR detection technology. The simulation research of radar signal processing has the characteristics of flexibility, convenience, speed, economy, etc. It is of great significance for the research and development of radar technology. Firstly, the detection principle of range and velocity of pulsed Doppler radar is analyzed, and the meaning and properties of ambiguity function of PD radar are studied. The fuzzy functions corresponding to several different signals are analyzed and simulated respectively. Based on this, a waveform design method with high resolution is selected. Secondly, according to the radar detection performance, The performance requirements such as resolution and measurement accuracy are studied in this paper. The characteristics of the LFM signal are analyzed, and the echo signal of the target is simulated. It is added into noise and clutter to form mixed signal and pulse compression, moving target detection and CFAR processing are carried out. In this paper, the pulse canceller cascade Doppler filter bank is chosen to realize. The CFAR processing part, the unit average CFAR detection, is chosen to realize. Finally, the radar signal processing system block diagram is given, and the objective function is established. The simulation results are analyzed to verify that the distance and velocity information of the target can be obtained effectively and the precision requirement can be satisfied by analyzing the simulation results.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN957.51

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