本文關(guān)鍵詞： 透視雷達 信號處理機 BP成像算法 顯控系統(tǒng)　出處：《電子科技大學》2015年碩士論文　論文類型：學位論文

【摘要】：建筑物透視雷達發(fā)射特定頻段的超寬帶電磁波信號,透過墻體介質(zhì),來實現(xiàn)對不可見區(qū)域內(nèi)部運動目標的檢測以及未知區(qū)域的成像。本設(shè)計中,為了能有較高的分辨率,故采用兩發(fā)八收的天線陣列,兩個發(fā)射天線分時發(fā)送,最終等效成一發(fā)十六收。目前該雷達廣泛應(yīng)用與救災(zāi)救援,刑偵執(zhí)法,解救人質(zhì)等領(lǐng)域,具有很大的實用價值。本文針對透視雷達小型化,便攜化的發(fā)展趨勢,提出了一種基于FPGA?DSP的信號處理機以及基于嵌入式平臺的顯控終端的設(shè)計方案,設(shè)計并實現(xiàn)了其主要功能,本設(shè)計主要工作內(nèi)容如下:1.根據(jù)透視雷達信號處理機的功能要求,完成了其具體的方案框架設(shè)計,并根據(jù)該框架方案以及數(shù)據(jù)傳輸、處理量、運算速度的大小,完成了系統(tǒng)主要芯片F(xiàn)PGA和DSP的選型。在此基礎(chǔ)上完成了FPGA程序的編寫以及BP成像算法在DSP中的移植,最后完成了數(shù)據(jù)發(fā)送接口的設(shè)計。2.針對顯控系統(tǒng)的要求,完成了一種基于嵌入式平臺的穿墻雷達顯控終端的設(shè)計方案,完成了主要核心芯片的選型。在此基礎(chǔ)上,完成了linux系統(tǒng)的移植,界面程序的編寫以及接口驅(qū)動程序的編寫,完成了人機交互圖形化窗口界面,既能實現(xiàn)穿墻探測的成像結(jié)果,又夠?qū)崿F(xiàn)用戶參數(shù)配置。3.根據(jù)前面已經(jīng)完成的內(nèi)容,聯(lián)合前端的采集卡,信號處理機,顯控模塊一起,設(shè)計了幾個仿真與實際測量的實驗,分別進行FPGA與DSP之間數(shù)據(jù)鏈路驗證、BP算法移植的驗證、DSP與顯控系統(tǒng)之間數(shù)據(jù)通路驗證、顯控系統(tǒng)實時成像界面驗證以及系統(tǒng)聯(lián)調(diào)測試實驗等。根據(jù)以上實驗,可以驗證整個信號處理機數(shù)據(jù)處理及算法移植正確,顯控終端圖像顯示正確且刷新速率5幀每秒。整個系統(tǒng)平臺具備小型化、便攜化的特點,可以方便的隨雷達系統(tǒng)移動,完成隔墻探測運動目標及場景成像的任務(wù)。
[Abstract]:The building perspective radar transmits ultra-wideband electromagnetic wave signal in certain frequency band, through the wall medium, to realize the detection of the moving target inside the invisible area and the imaging of the unknown region. In order to have a higher resolution, the antenna array with two transmitters and eight receivers is adopted, and the two transmitting antennas are transmitted in a time-sharing manner, which is equivalent to one 16 receiver. At present, the radar is widely used in disaster relief and rescue, and criminal investigation and law enforcement. In view of the trend of miniaturization and portability of perspective radar, a new method based on FPGA is proposed in this paper. The signal processor of DSP and the design scheme of display and control terminal based on embedded platform are designed and realized. The main work of this design is as follows: 1. According to the functional requirements of the perspective radar signal processor, completed its specific scheme framework design, and according to the framework scheme and data transmission, processing capacity. On the basis of the selection of the main chips of the system, FPGA and DSP, the programming of FPGA and the transplantation of BP imaging algorithm in DSP are completed. Finally, the design of data transmission interface. 2. According to the requirements of display and control system, a design scheme of display and control terminal of wall-penetrating radar based on embedded platform is completed. On this basis, the transplant of linux system, the programming of interface program and the programming of interface driver are completed, and the graphical window interface of man-machine interaction is completed. Can not only achieve the imaging results of wall detection, but also achieve user parameter configuration .3.According to the previous completed content, combined front-end acquisition card, signal processor, display and control module together. Several experiments of simulation and actual measurement are designed to verify the data link between FPGA and DSP and the data path between DSP and display control system. According to the above experiments, the data processing and algorithm transplantation of the whole signal processor can be verified correctly. The display and control terminal image display is correct and the refresh rate is 5 frames per second. The whole system platform has the characteristics of miniaturization and portability, which can move with the radar system conveniently. Complete the task of detecting moving target and scene imaging by partition wall.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN957.51

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本文編號：1470069