【作者】 梁军；

【导师】 舒汀；

【作者基本信息】 上海交通大学 ， 电子与通信工程（专业学位）， 2017， 硕士

【摘要】 针对新型多功能机载雷达回波模拟器系统的研制需求,本文在论述回波模拟器原理、目标回波及有源干扰数学模型等的基础上,对雷达回波模拟器的关键技术进行了研究,并最终设计和实现了一种多功能雷达中频回波模拟器。本文的工作主要围绕以下几个方面展开:(1)高精度目标回波模拟。本文在详细分析目标回波原理的基础上,给出了距离、速度等目标特性的实现方案。并针对目前超宽带、高分辨雷达的训练需求,提出了一种基于FPGA的雷达回波高精度延时的实现方法,该方法能实现回波的延时精度小于0.5ns,使模拟器在相关性能指标上有了较大提高。(2)复杂的干扰样式产生。针对现代战场电磁环境日益复杂这一现实,本文研究了多种有源干扰样式的产生原理和作用机理,包括多种欺骗性干扰和压制性干扰,并设计了相应的实现方案。系统所模拟的干扰样式较齐全,能满足现代雷达对复杂战场环境的测试要求。(3)模拟器系统设计与工程实现。对中频模拟器系统进行软硬件设计,同时提出一种宽带低杂散雷达信号的实现方法,便于系统自检。最后通过专用数字射频存储器(DRFM)模块调试输出回波信号。通过对比预设参数和测试结果,表明该中频回波模拟器各项指标符合设计需求,且具有较高精度。更多还原

【Abstract】 Motivated by the need for developing the new multi-functional radar echo simulator system,the principle of the echo simulator and the model of both the target and active jamming are introduced and the key techniques of radar echo simulator are then developed in this thesis in order to design and implement a multi-functional radar IF echo simulator.The work of this thesis mainly refers to the following aspects:Firstly,high precision target echo simulation.Based on the detailed analysis of the target echo principle,this thesis gave the implementation method of the target characteristics such as range,velocity and so on.Aiming at the training requirements of ultra-wideband and high-resolution radar,a high-precision time delay implementation method of radar echo based on FPGA was proposed.The method can achieve the delay accuracy of the echo less than 0.5ns,so that the relevant performance and indicators in the simulator has been greatly improved.Secondly,complex jamming synthesis.In view of the fact that the electromagnetic environment of modern battlefield is becoming more and more complicated,this thesis studied the generation principle and the action mechanism of many kinds of active jamming,including deceptive jamming and repressive jamming.Then the corresponding implementation method was proposed.The modes of jamming simulated by the system is complete,which can meet the testing requirements of the modern radar on the complex battlefield environment.Thirdly,simulator system design and engineering implementation.The hardware and software design of the IF simulator system was proposed.And a implementation method of wide-band low spurious radar signal was proposed for the system self-test.Finally echo signal was generated using the specialized digital radio frequency memory(DRFM)module.The generated echo in the experiment demonstrates that the simulator system meets the requirements as the set parameters require and achieves high accuracy.更多还原