战场电磁环境射频级仿真研究

发布时间：2018-01-17 19:17

本文关键词：战场电磁环境射频级仿真研究　出处：《沈阳航空航天大学》2017年硕士论文　论文类型：学位论文

更多相关文章： 电磁环境 战场态势 LPI雷达 FPGA DDS

【摘要】：现代战争中异常激烈的电子对抗行动,使得作战双方所处的战场电磁环境不断恶化,具体表现在:辐射源数量多,信号密集、辐射源体制多,波形经过复杂调制、辐射源频带宽,各类调制信号在超宽的工作频带上相互交叠。如何研制或改进电子战装备,训练电子战装备的作战人员,使其能适应复杂战场电磁环境,是打赢高科技水平下现代战争急需解决的重要课题。针对以上问题,提出了基于射频级信号的战场电磁环境仿真系统,战术层仿真结合射频级信号仿真,构建了贴近实战的复杂战场电磁环境。从顶层设计出发,对仿真系统的功能需求、体系结构及实现方案等内容展开深入探讨,并以低截获概率(LPI)雷达为例,对雷达信号的分析建模方法进行了深入分析,研究了动态功率管理以及脉冲压缩等实现雷达低截获性能的关键技术;从战术层仿真角度出发,对战术层仿真系统的关键技术展开了深入分析,研究了雷达信号的脉冲描述字(PDW)模型及相应的PDW生成技术,分析了辐射源的运动行为模型,对战术层仿真软件的设计思路及战场态势显示等技术展开了深入研究;从信号层仿真角度出发,在FPGA和高速DAC子卡搭建的硬件环境上,完成了各类复杂调制下基带雷达信号的程控产生,分析了基于DDS的信号产生方案,对雷达信号的辐射特性进行了详细设计,研究了FPGA与高速DA芯片接口逻辑的设计方案,最后对仿真系统进行了联调测试,实测表明仿真系统达到了预定设计要求,具有很强的工程应用价值。
[Abstract]:The extremely fierce electronic countermeasures in the modern war make the electromagnetic environment of the battlefield between the two sides of the battle continuously deteriorate. The specific manifestation is that the number of emitter sources is large, the signals are dense, and the system of emitter sources is many. The waveform is modulated, the frequency bandwidth of the emitter source, and all kinds of modulated signals overlap with each other in the ultra-wide working band. How to develop or improve the electronic warfare equipment and train the warfighters of the electronic warfare equipment. Making it adapt to the complex battlefield electromagnetic environment is an important task to be solved urgently in order to win the high-tech war. In view of the above problems, a simulation system of battlefield electromagnetic environment based on RF level signal is proposed. Tactical layer simulation combined with RF level signal simulation, a complex battlefield electromagnetic environment close to actual combat is constructed. From the top level design, the functional requirements, architecture and implementation scheme of the simulation system are discussed in depth. Taking LPI (low probability of interception) radar as an example, the modeling method of radar signal analysis is deeply analyzed, and the key technologies such as dynamic power management and pulse compression are studied to realize the low interception performance of radar. From the point of view of tactical layer simulation, the key technology of tactical layer simulation system is deeply analyzed, and the pulse description word (PDW) model of radar signal and the corresponding PDW generation technology are studied. The motion behavior model of emitter is analyzed, and the design idea of tactical layer simulation software and battlefield situation display technology are studied deeply. From the point of view of signal layer simulation, in the hardware environment of FPGA and high-speed DAC sub-card, the program control generation of baseband radar signal under various complex modulation is completed. The signal generation scheme based on DDS is analyzed, the radiation characteristic of radar signal is designed in detail, and the design of interface logic between FPGA and high speed DA chip is studied. Finally, the test of the simulation system is carried out. The experimental results show that the simulation system meets the design requirements and has a strong engineering application value.
【学位授予单位】：沈阳航空航天大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN97

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