基于DSP的雷达目标回波信号杂波抑制方法的研究
发布时间：2018-07-17 03:54
【摘要】：在雷达系统中雷达信号处理占有至关重要的地位,现代雷达工作环境日益复杂,这对雷达信号处理系统提出了更高要求。衡量雷达好坏的一个重要指标是杂波抑制性能,杂波抑制对雷达来说至关重要。本文首先通过介绍雷达信号处理的发展现状,进而对雷达发射信号、回波信号及杂波特性分别进行分析,了解雷达信号处理的目的。针对回波信号的杂波抑制技术,分析了动目标显示(MTI)、动目标检测(MTD)以及脉冲多普勒(PD),还有杂波图检测技术和恒虚警检测(CFAR)技术。在仿真软件matlab中进行算法验证并分析结果。结合雷达信号处理的技术特点和发展趋势,设计雷达信号处理流程,研究雷达信号处理技术算法的工程实现。设计了模数转换电路、以EMIFA和PCI总线作为数据传输通道以及电源模块,以DSP和FPGA相结合为主的雷达信号处理模块硬件平台的处理系统。通过基于matlab的软件CCSLink进行目标回波仿真设计,自动生成可在DSP上执行的代码,最后通过软件进行算法的设计编程,针对雷达回波信号的杂波抑制算法进行仿真验证。对比matlab仿真结果和硬件平台的仿真结果,表明所设计的雷达信号处理硬件系统完全能够实现杂波抑制,得到较好的效果。
[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.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN957.51
，
本文编号：2128891
[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.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN957.51
，
本文编号：2128891
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