分布式雷达目标信息传输系统设计
发布时间：2019-06-15 12:30
【摘要】：分布式雷达组网技术是为了应对现代战场上电子干扰和反辐射导弹等“四大威胁”而形成的一种新的雷达体制,是伴随着现代军用电子设备向系统化发展的趋势而诞生的。组网后,网内的单部雷达不仅保留了各自的特性,而且彼此之间还可以实现信息资源的共享,有效发挥出组网后的系统化作战效能。然而分站雷达在与数据处理中心进行无线通信时由于信道固有的噪声和衰落特性以及环境噪声的影响,传输信号不可避免的会受到各种干扰,特别是由于城市障碍物造成的多径干扰而出现传输错误,因此保证分站雷达与数据处理中心之间可靠、高效地传输信息是雷达组网后的关键问题之一。本课题研究的对象是多基雷达组网形式,即整个雷达组网系统包含多个雷达发射站和一个数据处理中心。本文针对分站与数据处理中心通信过程中存在的数据可靠性问题和抗干扰问题进行了深入的研究,并提出基于FPGA的雷达目标信息传输系统的设计方案。根据设计方案对各部分进行建模,在建模的基础上再进行抗干扰性能分析和设计实现。主要工作包括:1.对常用的帧同步方法进行了研究,并在详细分析本课题设计的数据帧结构的基础上,根据帧结构的特点选择了合适的帧同步检测方法和参数,给出FPGA的模块设计和仿真。2.深入了解了信息传输中的的可靠性技术、差错控制编码理论,着重对其中的卷积编码和Viterbi译码算法进行了深入的研究。根据课题需求,确定了卷积编码器的约束长度、码率以及Viterbi译码器的回溯深度,并给出了FPGA设计方案。3.完成了对扩频通信的原理、特点、系统模型的研究。根据本课题需要,着重对直扩系统进行了深入的研究,对常用的伪随机码进行了分析和比较;对扩频同步中的伪码捕获与跟踪、MSK调制解调等技术研究分析,并给出其FPGA的设计方案。4.利用Simulink通信仿真平台对传输系统和各模块进行建模与仿真,对卷积编译码和直扩系统进行抗干扰分析。采用Verilog语言、QuartusII 9.0对传输系统的设计方案进行设计实现,并利用Modelsim仿真工具对实现方案进行仿真,结合Simulink的理论仿真结果验证了方案的可行性以及正确性。
[Abstract]:Distributed radar networking technology is a new radar system formed to deal with the "four threats" of electronic interference and anti-radiation missile in modern battlefield, which is born with the trend of systematic development of modern military electronic equipment. After networking, the single radar in the network not only retains its own characteristics, but also can share the information resources with each other, and give full play to the systematic combat effectiveness after networking. However, when the sub-station radar communicates with the data processing center wirelessly, due to the inherent noise and fading characteristics of the channel and the influence of environmental noise, the transmission signal will inevitably be interfered with, especially due to the multi-path interference caused by urban obstacles, so it is one of the key problems to ensure the reliability between the sub-station radar and the data processing center, and to transmit the information efficiently. The research object of this paper is the multi-base radar networking form, that is, the whole radar networking system includes multiple radar transmitting stations and a data processing center. In this paper, the data reliability and anti-interference problems existing in the communication process between the sub-station and the data processing center are deeply studied, and the design scheme of radar target information transmission system based on FPGA is put forward. According to the design scheme, each part is modeled, and then the anti-interference performance is analyzed and implemented on the basis of modeling. The main work includes: 1. The common frame synchronization methods are studied, and based on the detailed analysis of the data frame structure designed in this paper, the appropriate frame synchronization detection methods and parameters are selected according to the characteristics of the frame structure, and the module design and simulation of FPGA are given. 2. The reliability technology and error control coding theory in information transmission are deeply understood, and the convolution coding and Viterbi decoding algorithm are studied in detail. According to the requirements of the project, the constraint length, bit rate and backtracking depth of Viterbi decoder are determined, and the design scheme of FPGA is given. The principle, characteristics and system model of spread spectrum communication are studied. According to the needs of this subject, the DSSS system is deeply studied, the commonly used pseudorandom codes are analyzed and compared, and the pseudo-code acquisition and tracking, MSK modulation and demodulation techniques in spread spectrum synchronization are studied and analyzed, and the design scheme of FPGA is given. 4. The Simulink communication simulation platform is used to model and simulate the transmission system and each module, and the anti-interference analysis of convolutional coding and decoding and DSSS system is carried out. Verilog language and QuartusII 9.0 are used to design and implement the transmission system, and Modelsim simulation tool is used to simulate the scheme. Combined with the theoretical simulation results of Simulink, the feasibility and correctness of the scheme are verified.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.52
本文编号：2500208
[Abstract]:Distributed radar networking technology is a new radar system formed to deal with the "four threats" of electronic interference and anti-radiation missile in modern battlefield, which is born with the trend of systematic development of modern military electronic equipment. After networking, the single radar in the network not only retains its own characteristics, but also can share the information resources with each other, and give full play to the systematic combat effectiveness after networking. However, when the sub-station radar communicates with the data processing center wirelessly, due to the inherent noise and fading characteristics of the channel and the influence of environmental noise, the transmission signal will inevitably be interfered with, especially due to the multi-path interference caused by urban obstacles, so it is one of the key problems to ensure the reliability between the sub-station radar and the data processing center, and to transmit the information efficiently. The research object of this paper is the multi-base radar networking form, that is, the whole radar networking system includes multiple radar transmitting stations and a data processing center. In this paper, the data reliability and anti-interference problems existing in the communication process between the sub-station and the data processing center are deeply studied, and the design scheme of radar target information transmission system based on FPGA is put forward. According to the design scheme, each part is modeled, and then the anti-interference performance is analyzed and implemented on the basis of modeling. The main work includes: 1. The common frame synchronization methods are studied, and based on the detailed analysis of the data frame structure designed in this paper, the appropriate frame synchronization detection methods and parameters are selected according to the characteristics of the frame structure, and the module design and simulation of FPGA are given. 2. The reliability technology and error control coding theory in information transmission are deeply understood, and the convolution coding and Viterbi decoding algorithm are studied in detail. According to the requirements of the project, the constraint length, bit rate and backtracking depth of Viterbi decoder are determined, and the design scheme of FPGA is given. The principle, characteristics and system model of spread spectrum communication are studied. According to the needs of this subject, the DSSS system is deeply studied, the commonly used pseudorandom codes are analyzed and compared, and the pseudo-code acquisition and tracking, MSK modulation and demodulation techniques in spread spectrum synchronization are studied and analyzed, and the design scheme of FPGA is given. 4. The Simulink communication simulation platform is used to model and simulate the transmission system and each module, and the anti-interference analysis of convolutional coding and decoding and DSSS system is carried out. Verilog language and QuartusII 9.0 are used to design and implement the transmission system, and Modelsim simulation tool is used to simulate the scheme. Combined with the theoretical simulation results of Simulink, the feasibility and correctness of the scheme are verified.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.52
【参考文献】
相关期刊论文 前3条
1 丁溯泉,杨知行,潘长勇,郭兴波;扩频技术:历史、现状及发展[J];电讯技术;2004年06期
2 吴亚婷;;卷积码编译码的Matlab仿真及其性能研究[J];电脑知识与技术;2010年04期
3 殷云志;;无线通信抗干扰技术及发展趋势[J];无线电工程;2008年10期
相关硕士学位论文 前1条
1 胡伟;基于FPGA的Turbo码编译码器研发[D];西安电子科技大学;2011年
，本文编号：2500208
本文链接：https://www.wllwen.com/kejilunwen/wltx/2500208.html
