北斗信号的射频干扰兼容性研究
发布时间：2018-11-25 20:02
【摘要】：随着卫星导航技术的不断进步和对地观测遥感技术的发展,不断有新的导航系统和雷达卫星上线,机场等地的各种测距设施与个人无线电设备持续运行,各类系统在频谱上的交叠更加普遍,不同系统之间的兼容性问题日益突出。北斗导航系统作为该类系统中的一部分,也面临着各类射频干扰的威胁。由此可见,北斗导航系统的射频干扰的兼容性问题非常值得研究。本文首先简述了论文研究的背景状况以及当前的发展动态,然后对北斗导航系统的定位原理以及北斗导航信号的生成方式做了说明。同时对新型的BOC信号的生成方式进行了说明,对BOC调制的时频结构进行分析,总结了BOC的特点及优势。本文设计了基于北斗导航的软件接收机平台,同时兼容传统调制信号和新型的BOC调制信号,对传统的调制信号的捕获和跟踪方式进行介绍。同时对于新型的BOC调制信号采用了不同于PSK信号的捕获和跟踪方式并进行改进。接下来对接收机性能的指标进行了讨论,从接收机不同工作阶段的工作情况进行了评估,提出了利用跟踪精度来表征接收机性能的方法。对不同的接收机类型以及接收机中射频干扰的评估标准进行了阐述,对集总的射频干扰评估标准进行推导。给出了接收机在潜在的两种射频干扰背景下的性能仿真。同时本文从射频干扰原理角度分析,对现有的评估标准实施改进并进行了仿真验证。本文同时给出了实物验证的验证方案。最后提出了利用频域消隐技术提高接收机抗干扰能力的方法,同时对该方法进行阐述并在BOC调制的条件下进行仿真并得出仿真结果。最后比较时域消隐和频域消隐的特点,给出了综合消隐接收机的方案。
[Abstract]:With the continuous progress of satellite navigation technology and the development of remote sensing technology for earth observation, there are new navigation systems and radar satellites on line, various ranging facilities and personal radio equipment in places such as airports and other places continue to operate. The overlapping of all kinds of systems in the spectrum is more common, and the compatibility between different systems is becoming more and more serious. Beidou navigation system, as a part of the system, also faces the threat of various RF interference. It can be seen that the compatibility of radio frequency interference in Beidou navigation system is worth studying. In this paper, the background and the current development of the research are briefly introduced, and then the positioning principle of the Beidou navigation system and the generating method of the Beidou navigation signal are explained. At the same time, the new generation mode of BOC signal is explained, the time-frequency structure of BOC modulation is analyzed, and the characteristics and advantages of BOC are summarized. In this paper, a software receiver platform based on Beidou navigation is designed, which is compatible with both the traditional modulation signal and the new BOC modulation signal. The acquisition and tracking method of the traditional modulation signal is introduced. At the same time, the acquisition and tracking of the new BOC modulation signal is different from that of the PSK signal and improved. Then the performance index of the receiver is discussed and the performance of the receiver is evaluated at different working stages. A method of using tracking accuracy to characterize the performance of the receiver is proposed. The different types of receiver and the evaluation standard of RF interference in receiver are expounded, and the evaluation standard of lumped RF interference is deduced. The performance simulation of the receiver under the background of two potential radio frequency interference is given. At the same time, from the point of view of RF interference theory, the existing evaluation standards are improved and verified by simulation. At the same time, the verification scheme of physical verification is given. Finally, a method of improving the anti-jamming ability of the receiver by frequency domain blanking technique is proposed. The method is described and simulated under the condition of BOC modulation and the simulation results are obtained. Finally, the characteristics of time domain blanking and frequency domain blanking are compared, and the scheme of integrated blanking receiver is presented.
【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】：TN967.1
本文编号：2357231
[Abstract]:With the continuous progress of satellite navigation technology and the development of remote sensing technology for earth observation, there are new navigation systems and radar satellites on line, various ranging facilities and personal radio equipment in places such as airports and other places continue to operate. The overlapping of all kinds of systems in the spectrum is more common, and the compatibility between different systems is becoming more and more serious. Beidou navigation system, as a part of the system, also faces the threat of various RF interference. It can be seen that the compatibility of radio frequency interference in Beidou navigation system is worth studying. In this paper, the background and the current development of the research are briefly introduced, and then the positioning principle of the Beidou navigation system and the generating method of the Beidou navigation signal are explained. At the same time, the new generation mode of BOC signal is explained, the time-frequency structure of BOC modulation is analyzed, and the characteristics and advantages of BOC are summarized. In this paper, a software receiver platform based on Beidou navigation is designed, which is compatible with both the traditional modulation signal and the new BOC modulation signal. The acquisition and tracking method of the traditional modulation signal is introduced. At the same time, the acquisition and tracking of the new BOC modulation signal is different from that of the PSK signal and improved. Then the performance index of the receiver is discussed and the performance of the receiver is evaluated at different working stages. A method of using tracking accuracy to characterize the performance of the receiver is proposed. The different types of receiver and the evaluation standard of RF interference in receiver are expounded, and the evaluation standard of lumped RF interference is deduced. The performance simulation of the receiver under the background of two potential radio frequency interference is given. At the same time, from the point of view of RF interference theory, the existing evaluation standards are improved and verified by simulation. At the same time, the verification scheme of physical verification is given. Finally, a method of improving the anti-jamming ability of the receiver by frequency domain blanking technique is proposed. The method is described and simulated under the condition of BOC modulation and the simulation results are obtained. Finally, the characteristics of time domain blanking and frequency domain blanking are compared, and the scheme of integrated blanking receiver is presented.
【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】：TN967.1
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