雷达目标模拟器的数字化关键技术研究

发布时间：2018-04-09 06:40

本文选题：数字化　切入点：FPGA　出处：《长春理工大学》2017年硕士论文

【摘要】：随着雷达技术和电子技术的发展,数字化技术在雷达中得到全面应用。数字化技术使雷达实现了功能化多样化,同时使雷达具有了更为优异的电气性能,系统灵敏度、动态范围以及信噪比等重要性能指标得到大幅度提升,雷达信号质量和探测性能明显提高,系统抗干扰能力和可靠性更加强大。雷达目标模拟器是减少雷达开发周期和开发费用的重要手段和方法,因此对雷达目标模拟器的数字化技术研究有着较好的发展前景以及深远的意义。雷达目标模拟器包含的工作模式有:注入式和转发式。本文主要的研究内容是基于转发工作模式下的雷达目标模拟器的数字化关键技术研究。一、对基于直接数字频率合成器(DDS)芯片AD9914和在线可编程门阵列(FPGA)的频率综合器的研究设计,主要是提高系统的频率稳定度,降低系统杂散以及相位噪声。结合设计和测试,得到输出频率为8GHz~9GHz,功率大于10d Bm的频率综合器。二、通过对数字射频存储(DRFM)技术进行研究,完成多路采样DRFM系统的设计,并且对系统重要单元(ADC采样阵列以及FPGA控制模块)的实现方案做出详细的介绍。根据整机测试和结果的分析,确定所设计的系统可以对高达1.6GHz的中频信号进行处理和存储,且可以实现对输入的信号保真处理。
[Abstract]:With the development of radar technology and electronic technology, digital technology has been fully applied in the radar. The radar digital technology can realize the function of diversification, while the radar has more excellent electrical properties, the system sensitivity, dynamic range and signal-to-noise ratio and other important performance can be greatly improved, and the detection performance of radar signal quality improved anti-interference capability and reliability of the system is more powerful. The radar target simulator is an important means of reducing and the method of radar development cycle and development costs, so the research of digital technology on the radar target simulator has good prospects for development and far-reaching significance. The working mode of the radar target simulator includes: injection and forwarding. The main content of this paper is to study the key technology of digital radar simulator based on the forwarding mode. One of Based on direct digital synthesizer (DDS) chip AD9914 and online programmable gate array (FPGA) on the design of the frequency synthesizer, mainly to improve the frequency stability of the system, reduce the stray and phase noise. Combined with the design and testing, get the output frequency is 8GHz ~9GHz frequency synthesizer, power is greater than 10d Bm two. And through the storage of digital RF (DRFM) research technology, completed the design of multi-channel DRFM system, and the importance of the unit system (ADC sampling array and FPGA control module) implementation scheme is introduced in detail. According to the analysis of the test results and the determination of the system can be processed and stored on the intermediate frequency signal up to 1.6GHz, and can realize the processing of the input signal fidelity.

【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN957

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