数字射频存储系统（DRFM）设计

发布时间：2018-10-20 12:44

【摘要】：在现代化的信息化战争中，数字射频存储（DRFM）广泛应用在雷达对抗领域，随着现在雷达技术的发展，，对雷达的干扰变得越来越困难，这就对DRFM系统提出了更高更苛刻的要求。根据现在雷达的高频率和大带宽背景，本文分别对DRFM系统的接收机和发射机这两个方面进行了研究，提出了一种算法高效、结构简单、便于实现以及可以节省存储空间的接收机结构和一种结构简单、灵活性强、易于实现的发射机结构。本文的主要工作有下面几个方面：从原理结构等方面简单介绍了DRFM系统，随后在介绍了数字接收机相关理论的基础上，提出了一种简单高效的基于多相滤波的信道化下变频接收机结构，并对该结构进行了仿真。然后将认知无线电中的直接波形合成理论应用到DRFM系统的发射机中，提出了一种简单灵活性强的基于直接波形合成的发射机结构，并对该结构进行了仿真。最后构建了一个具有上述两种结构的简单DRFM系统，并利用FPGA和MATLAB对该系统进行了实现和仿真。
[Abstract]:In the modern information war, digital RF storage (DRFM) is widely used in the field of radar countermeasure. With the development of radar technology, jamming to radar becomes more and more difficult, which puts forward higher and more demanding requirements for DRFM system. According to the background of high frequency and large bandwidth of radar, this paper studies the receiver and transmitter of DRFM system, and presents an algorithm with high efficiency and simple structure. The receiver structure is easy to implement and can save storage space, and a transmitter structure with simple structure, strong flexibility and easy implementation. The main work of this paper is as follows: the DRFM system is briefly introduced from the aspects of principle and structure, and then the digital receiver theory is introduced. A simple and efficient channelized downconversion receiver based on polyphase filter is proposed and simulated. Then the theory of direct waveform synthesis in cognitive radio is applied to the transmitter of DRFM system. A simple and flexible transmitter structure based on direct waveform synthesis is proposed and simulated. Finally, a simple DRFM system with the above two structures is constructed, and the system is implemented and simulated by FPGA and MATLAB.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN957.5;TP333

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