多通道透视雷达信号处理机及显控终端的研究

发布时间：2018-01-28 06:42

本文关键词： 透视雷达信号处理机 BP成像算法显控系统　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：建筑物透视雷达发射特定频段的超宽带电磁波信号,透过墙体介质,来实现对不可见区域内部运动目标的检测以及未知区域的成像。本设计中,为了能有较高的分辨率,故采用两发八收的天线阵列,两个发射天线分时发送,最终等效成一发十六收。目前该雷达广泛应用与救灾救援,刑侦执法,解救人质等领域,具有很大的实用价值。本文针对透视雷达小型化,便携化的发展趋势,提出了一种基于FPGA?DSP的信号处理机以及基于嵌入式平台的显控终端的设计方案,设计并实现了其主要功能,本设计主要工作内容如下:1.根据透视雷达信号处理机的功能要求,完成了其具体的方案框架设计,并根据该框架方案以及数据传输、处理量、运算速度的大小,完成了系统主要芯片FPGA和DSP的选型。在此基础上完成了FPGA程序的编写以及BP成像算法在DSP中的移植,最后完成了数据发送接口的设计。2.针对显控系统的要求,完成了一种基于嵌入式平台的穿墙雷达显控终端的设计方案,完成了主要核心芯片的选型。在此基础上,完成了linux系统的移植,界面程序的编写以及接口驱动程序的编写,完成了人机交互图形化窗口界面,既能实现穿墙探测的成像结果,又够实现用户参数配置。3.根据前面已经完成的内容,联合前端的采集卡,信号处理机,显控模块一起,设计了几个仿真与实际测量的实验,分别进行FPGA与DSP之间数据链路验证、BP算法移植的验证、DSP与显控系统之间数据通路验证、显控系统实时成像界面验证以及系统联调测试实验等。根据以上实验,可以验证整个信号处理机数据处理及算法移植正确,显控终端图像显示正确且刷新速率5帧每秒。整个系统平台具备小型化、便携化的特点,可以方便的随雷达系统移动,完成隔墙探测运动目标及场景成像的任务。
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN957.51

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