基于DDS的复杂雷达信号发生器设计

发布时间：2018-07-08 11:38

本文选题：DDS + FPGA　；参考：《电子科技大学》2017年硕士论文

【摘要】：雷达信号发生器是雷达回波信号模拟器的核心组件,随着雷达技术在工业应用及民用上的普及和微电子技术的快速发展,雷达信号发生器的使用环境、场合越来越复杂,雷达信号发生器需要产生的雷达回波信号种类、回波信号的质量要求也越来越高。为了满足雷达回波模拟器的需求,本论文采用FPGA+DDS的实现结构设计了一款基于DDS的复杂雷达信号发生器。本论文首先对雷达信号发生器的功能及性能要求进行分析,介绍了本课题设计的雷达信号发生器所需要达到的指标要求。针对这些指标要求对雷达信号发生器功能部分进行细分,拆分系统结构、细化设计,最终将系统划分为核心模块及控制模块两个功能模块。核心模块实现雷达信号产生,控制模块负责雷达信号产生的控制及系统其它功能实现。在完成系统方案分析及设计的基础上,本论文完成了基于DDS的复杂雷达信号发生器的硬件电路设计及逻辑设计。硬件电路设计部分分为控制模块及核心模块硬件电路,两部分硬件电路主要由FPGA电路、电源电路、DDS电路、信号通路电路等组成,本文详细介绍了FPGA选型、DDS电路设计、电源电路设计。逻辑设计主要由雷达信号发生器控制及通信逻辑、雷达信号产生逻辑组成,控制及通信逻辑包含控制模块逻辑及核心模块部分控制逻辑,雷达信号产生逻辑为本文设计核心。本文从DDS产生雷达信号原理、DDS产生雷达信号实现方式两个方面详细介绍雷达信号产生逻辑的设计及实现。在本文中还将拓展核心模块功能的设计,使核心模块的使用不再局限于本系统中。随后,本论文介绍了系统的调试方法。系统的调试包括硬件电路板的调试及逻辑设计的调试,最后还要进行系统功能及性能的调试验证。经过对整个系统的调试验证,本文设计的基于DDS的复杂雷达信号发生器,满足设计性能及功能要求,达到了设计预期的目标。经过对整个系统设计的分析,基于DDS结构的雷达信号发生器在实现线性调频信号、频率捷变、频率跳变方面比传统雷达信号发生器优势突出。
[Abstract]:Radar signal generator is the core component of radar echo signal simulator. With the popularization of radar technology in industry and civil use and the rapid development of microelectronic technology, the application environment of radar signal generator is becoming more and more complicated. The types of radar echo signals needed to be generated by radar signal generators and the quality requirements of echo signals are becoming more and more high. In order to meet the requirement of radar echo simulator, a complex radar signal generator based on FPGA DDS is designed in this paper. In this paper, the function and performance requirements of radar signal generator are analyzed, and the requirements of radar signal generator designed in this paper are introduced. According to these indexes, the function part of radar signal generator is subdivided, the structure of the system is split and the design is refined. Finally, the system is divided into two functional modules: the core module and the control module. The core module realizes radar signal generation, and the control module is responsible for radar signal generation control and other functions of the system. Based on the analysis and design of the system scheme, the hardware circuit design and logic design of the complex radar signal generator based on DDS are completed in this paper. The hardware circuit design is divided into control module and core module hardware circuit. The two parts of hardware circuit are mainly composed of FPGA circuit, power supply circuit DDS circuit, signal path circuit, etc. In this paper, the design of FPGA type selection DDS circuit is introduced in detail. Power circuit design. Logic design mainly consists of radar signal generator control and communication logic, radar signal generation logic, control and communication logic including control module logic and core module control logic, radar signal generation logic is the core of this design. This paper introduces the design and implementation of radar signal generation logic in detail from two aspects: the principle of DDS generation radar signal and the realization mode of DDS signal generation. In this paper, we will expand the design of the core module function, so that the use of the core module is no longer limited to the system. Then, this paper introduces the debugging method of the system. The debugging of the system includes the debugging of the hardware circuit board and the logic design, and the debugging of the system function and performance. After the debugging and verification of the whole system, the complex radar signal generator based on DDS is designed in this paper, which meets the design performance and function requirements, and achieves the desired goal. Through the analysis of the whole system design, the radar signal generator based on DDS structure is superior to the traditional radar signal generator in the realization of linear frequency modulation signal, frequency agility and frequency jump.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN957

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