北斗导航接收机基带信号处理技术研究与实现
发布时间：2018-10-09 08:14
【摘要】：全球卫星导航系统(GNSS)不仅是关系国家国防安全的技术支撑系统,同时也是服务于民生的重要工具。我国自行研制的“北斗”导航定位系统也在逐步发展中。建设具有全球导航定位能力的北斗卫星导航系统对我国经济建设和国防建设产生着深远的影响。北斗二代卫星系统是我国独立自主研发的新一代卫星导航系统。基带信号处理是导航收机的核心部分之一。本论文首先分析了各国全球卫星导航系统的发展情况,并详细介绍了北斗二代导航系统的结构、卫星信号格式。通过研究多普勒偏移对卫星信号接收影响和对常用卫星信号捕获方法的分析,对原有接收机捕获算法进行改进。导航接收机的跟踪环路包括载波跟踪环和伪码跟踪环。本文将分别对其进行分析与研究。包括载波环路积分器、载波环鉴别器、环路滤波器、以及载波环的热噪声误差、阿伦方差;码环的测量误差和窄相关技术的研究。根据研究所得出的关键参数对本课题的跟踪环路进行设计与改进。接着本文详细介绍了基于FPGA+DSP架构的“北斗二代”(B1频点)接收机的实现方法。设计与实现了北斗接收机基带信号处理的软件算法,分别对FPGA中的模块设计和DSP中的软件控制算法流程进行了详细的介绍,完成了整个系统的软件设计。与射频前端设备及外部天线相连,组成了完整的北斗导航接收机。在静态环境下对接收机定位性能进行测试。定位结果表明,静态环境下本课题所研制的北斗接收机单点定位误差在10米之内,基本满足了北斗开放服务(Open Service)的定位精度指标。在该章结尾对产生定位误差的原因进行了分析。最后在总结与展望中回顾整个论文的研究与实现过程。并对下一步实现高精度的多频多模式的软件导航接收机进行展望,期盼我国北斗导航定位领域取得更大的突破。
[Abstract]:Global Satellite Navigation system (GNSS) is not only a technical support system related to national defense security, but also an important tool to serve people's livelihood. The Beidou navigation and positioning system developed by our country is also developing step by step. The construction of Beidou satellite navigation system, which has the ability of global navigation and positioning, has a profound influence on China's economic construction and national defense construction. Beidou second generation satellite system is a new generation satellite navigation system independently developed by our country. Baseband signal processing is one of the core parts of navigation receiver. In this paper, the development of global satellite navigation system is analyzed, and the structure of Beidou second generation navigation system and satellite signal format are introduced in detail. By studying the influence of Doppler offset on satellite signal reception and analyzing the common methods of satellite signal acquisition, the original receiver acquisition algorithm is improved. The tracking loop of the navigation receiver includes a carrier tracking loop and a pseudo code tracking loop. This paper will analyze and study it separately. It includes carrier loop integrator, carrier ring discriminator, loop filter, thermal noise error of carrier loop, Aron variance, measurement error of code loop and narrow correlation technique. The tracking loop is designed and improved according to the key parameters. Then this paper introduces the implementation method of "Beidou second Generation" (B1 frequency) receiver based on FPGA DSP architecture. The software algorithm of baseband signal processing in Beidou receiver is designed and implemented. The module design in FPGA and the software control algorithm flow in DSP are introduced in detail, and the software design of the whole system is completed. Connected with RF front end equipment and external antenna, a complete Beidou navigation receiver is formed. The performance of receiver positioning is tested in static environment. The positioning results show that the single point positioning error of the Beidou receiver developed in this paper is less than 10 meters under the static environment, which basically meets the positioning accuracy index of Beidou open service (Open Service). At the end of the chapter, the cause of the positioning error is analyzed. Finally, the research and implementation process of the whole thesis is reviewed in the summary and prospect. The next step is to realize the software navigation receiver with high precision and multi-frequency and multi-mode, in order to make a great breakthrough in the field of Beidou navigation and positioning in China.
【学位授予单位】：桂林电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN965.5
本文编号：2258620
[Abstract]:Global Satellite Navigation system (GNSS) is not only a technical support system related to national defense security, but also an important tool to serve people's livelihood. The Beidou navigation and positioning system developed by our country is also developing step by step. The construction of Beidou satellite navigation system, which has the ability of global navigation and positioning, has a profound influence on China's economic construction and national defense construction. Beidou second generation satellite system is a new generation satellite navigation system independently developed by our country. Baseband signal processing is one of the core parts of navigation receiver. In this paper, the development of global satellite navigation system is analyzed, and the structure of Beidou second generation navigation system and satellite signal format are introduced in detail. By studying the influence of Doppler offset on satellite signal reception and analyzing the common methods of satellite signal acquisition, the original receiver acquisition algorithm is improved. The tracking loop of the navigation receiver includes a carrier tracking loop and a pseudo code tracking loop. This paper will analyze and study it separately. It includes carrier loop integrator, carrier ring discriminator, loop filter, thermal noise error of carrier loop, Aron variance, measurement error of code loop and narrow correlation technique. The tracking loop is designed and improved according to the key parameters. Then this paper introduces the implementation method of "Beidou second Generation" (B1 frequency) receiver based on FPGA DSP architecture. The software algorithm of baseband signal processing in Beidou receiver is designed and implemented. The module design in FPGA and the software control algorithm flow in DSP are introduced in detail, and the software design of the whole system is completed. Connected with RF front end equipment and external antenna, a complete Beidou navigation receiver is formed. The performance of receiver positioning is tested in static environment. The positioning results show that the single point positioning error of the Beidou receiver developed in this paper is less than 10 meters under the static environment, which basically meets the positioning accuracy index of Beidou open service (Open Service). At the end of the chapter, the cause of the positioning error is analyzed. Finally, the research and implementation process of the whole thesis is reviewed in the summary and prospect. The next step is to realize the software navigation receiver with high precision and multi-frequency and multi-mode, in order to make a great breakthrough in the field of Beidou navigation and positioning in China.
【学位授予单位】：桂林电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN965.5
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相关期刊论文 前1条
1 纪元法;施浒立;孙希延;;一种Strobe相关器及其多径抑制性能研究[J];宇航学报;2007年05期
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