非相干散射雷达系统仿真与参数反演技术研究
发布时间：2018-08-03 14:36
【摘要】：电离层是地球大气环境中最为关键的部分,电离层的监测对移动通信、载人航天、卫星定位和导航等活动有着重要的影响。非相干散射雷达(ISR)是探测电离层最强大的地基设备,其具有探测功能强、参量多、精度高、分辨率好、高度范围覆盖大等优点。开展非相干散射雷达相关技术的研究可以极大的提升研究电离层的能力。本文结合非相干散射雷达探测理论,综合考虑雷达系统参数,环境干扰,信号处理方法等因素对雷达探测的影响,建立了非相干散射雷达仿真系统的主要模型及体系结构,完成了一套仿真精度高,可靠性好的雷达仿真系统。本文还基于非相干散射雷达参数反演理论,研究了利用法拉第旋转效应反演电离层参数的技术,搭建了数据反演模型,同时利用美国Jicamarca雷达实测数据完成了数据处理。主要工作如下:第一,分析了电离层非相干散射的物理模型,对非相干散射雷达系统仿真进行了需求分析。按照非相干散射雷达实际体系结构,构建了雷达系统仿真主要模型,并按照模块化的思想,先对ISR雷达的主要功能进行分模块仿真,然后将各个模块组合成完整的仿真系统。选择了可靠的实测数据与仿真结果进行对比,验证的仿真系统的合理性与可靠性。第二,研究了利用法拉第旋转效应反演电离层参数的算法,结合电磁波传播的磁离子效应与软目标雷达方程理论推导了雷达反演数据模型。同时采用美国Jicamarca雷达的实测数据完成了数据处理。通过反演结果的分析与对比,证明了反演技术的价值。
[Abstract]:Ionosphere is the most important part of the earth's atmospheric environment. Ionospheric monitoring plays an important role in mobile communication, manned spaceflight, satellite positioning and navigation. Incoherent scattering radar (ISR) is the most powerful ground equipment for ionospheric detection. It has many advantages such as strong detecting function, many parameters, high precision, good resolution and wide height coverage. The research of incoherent scattering radar technology can greatly improve the ability to study the ionosphere. Combined with the detection theory of incoherent scattering radar and considering the influence of radar system parameters, environment interference and signal processing methods, the main model and system structure of the simulation system of incoherent scattering radar are established in this paper. A radar simulation system with high simulation precision and good reliability is completed. Based on the theory of incoherent scattering radar parameter inversion, this paper studies the technique of inversion of ionospheric parameters by Faraday rotation effect, builds a data inversion model, and completes the data processing using the measured data of Jicamarca radar in the United States. The main work is as follows: firstly, the physical model of ionospheric incoherent scattering is analyzed, and the requirement of incoherent scattering radar system simulation is analyzed. According to the actual system structure of incoherent scattering radar, the main simulation model of radar system is constructed. According to the idea of modularization, the main functions of ISR radar are first simulated by modules, and then each module is integrated into a complete simulation system. The rationality and reliability of the simulation system are verified by comparing the reliable measured data with the simulation results. Secondly, the inversion algorithm of ionospheric parameters using Faraday rotation effect is studied, and the radar inversion data model is derived by combining the magneto ion effect of electromagnetic wave propagation with the theory of soft target radar equation. At the same time, the measured data of Jicamarca radar are used to complete the data processing. The value of the inversion technique is proved by the analysis and comparison of the inversion results.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN955
本文编号：2162060
[Abstract]:Ionosphere is the most important part of the earth's atmospheric environment. Ionospheric monitoring plays an important role in mobile communication, manned spaceflight, satellite positioning and navigation. Incoherent scattering radar (ISR) is the most powerful ground equipment for ionospheric detection. It has many advantages such as strong detecting function, many parameters, high precision, good resolution and wide height coverage. The research of incoherent scattering radar technology can greatly improve the ability to study the ionosphere. Combined with the detection theory of incoherent scattering radar and considering the influence of radar system parameters, environment interference and signal processing methods, the main model and system structure of the simulation system of incoherent scattering radar are established in this paper. A radar simulation system with high simulation precision and good reliability is completed. Based on the theory of incoherent scattering radar parameter inversion, this paper studies the technique of inversion of ionospheric parameters by Faraday rotation effect, builds a data inversion model, and completes the data processing using the measured data of Jicamarca radar in the United States. The main work is as follows: firstly, the physical model of ionospheric incoherent scattering is analyzed, and the requirement of incoherent scattering radar system simulation is analyzed. According to the actual system structure of incoherent scattering radar, the main simulation model of radar system is constructed. According to the idea of modularization, the main functions of ISR radar are first simulated by modules, and then each module is integrated into a complete simulation system. The rationality and reliability of the simulation system are verified by comparing the reliable measured data with the simulation results. Secondly, the inversion algorithm of ionospheric parameters using Faraday rotation effect is studied, and the radar inversion data model is derived by combining the magneto ion effect of electromagnetic wave propagation with the theory of soft target radar equation. At the same time, the measured data of Jicamarca radar are used to complete the data processing. The value of the inversion technique is proved by the analysis and comparison of the inversion results.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN955
【参考文献】
相关期刊论文 前6条
1 刘立波;万卫星;;我国空间物理研究进展[J];地球物理学报;2014年11期
2 丁宗华;鱼浪;代连东;许正文;吴健;;曲靖非相干散射雷达功率剖面的初步观测与分析[J];地球物理学报;2014年11期
3 丁宗华;代连东;董明玉;许正文;吴健;;非相干散射雷达进展:从传统体制到EISCAT 3D[J];地球物理学进展;2014年05期
4 丁宗华;代连东;赵振维;许正文;;非相干散射雷达的空间碎片信号处理与分析[J];电波科学学报;2014年03期
5 种小燕;张满莲;张顺荣;温晋;刘立波;宁百齐;万卫星;;基于非相干散射雷达和GPS观测研究Millstone Hill地区等离子体层电子含量[J];地球物理学报;2013年03期
6 吴永宏;吴健;吴振森;王先义;;非相干散射的一种非线性反演方法[J];电波科学学报;2008年01期
相关硕士学位论文 前3条
1 左铭;非相干散射雷达探测波形技术研究[D];南昌大学;2016年
2 武文俊;非相干散射雷达系统仿真与数据处理方法研究[D];南昌大学;2014年
3 程木松;加热扰动异常非相干散射谱实验研究[D];西安电子科技大学;2012年
，本文编号：2162060
本文链接：https://www.wllwen.com/kejilunwen/xinxigongchenglunwen/2162060.html
