多频段GNSS信号兼容技术研究
发布时间：2019-02-27 20:24
【摘要】：美国全球定位系统（Global Positioning System, GPS）的建成给世界的导航、定位与授时技术带来了巨大变革，俄罗斯，欧洲，中国也相继发展各自独立的L频段全球导航卫星系统（Global Navigation Satellite System，GNSS）。与L频段GNSS信号相比，C频段信号具有抗电离层影响和抗多路径性能好的优点，能够为对信号质量要求高的航空、金融和电力等国家重要部门和行业提供更加安全的服务性能，而S频段导航服务易与该频段上其它移动和无线服务融合的优势同样引起了各国对S频段GNSS的开发和建设，，未来C、S频段上多个导航卫星系统信号共存同样不容忽视，各频段上射频信号干扰不可避免，因此开展多频段GNSS信号的兼容性技术研究对于L、C、S频段导航卫星系统建设与发展意义重大。本文以863主题项目课题“GNSS兼容互用技术及新型信号体制研究”和专项课题“GNSS L/S/C频段兼容性分析研究”的研究内容为基础，对L、C、S频段GNSS信号的兼容性进行全面理论分析和仿真验证，并完善GNSS信号与带外射频信号的兼容性分析技术，深入研究GNSS信号信号调制和扩频码的设计技术，分析调制信号对兼容性的影响，并提出扩频码的设计新方法和扩频码兼容性分析概念。 本文研究内容主要分为以下4个方面： （1）全面分析GNSS信号兼容评估的模型和方法，分别构建基于频谱分离系数（Spectral Sepration Coefficient，SSC）和码跟踪谱灵敏度系数（Code TrackingSpctral Sensitivity Coefficient，CT_SSC）的兼容评估模型，确立有效载噪比衰减作为L、C、S频段GNSS信号兼容评估的通用方法，仿真计算各频段兼容性，并对结果进行评估。 （2）分析L、C、S频段GNSS信号和相邻射频信号的干扰特征，确定干扰评估的模型和方法，并进行干扰评估，包括L频段GNSS信号和射电天文（RadioAstronomy，RA）的干扰评估；C频段GNSS信号和RA，以及微波着陆系统（Micowave Landing System，MLS）的干扰评估；S频段GNSS信号和Globalstar系统，固定业务（Fixed Service，FS），以及全球微波互联接入（WorldwideInteroperability for Microwave Access，WiMAX）的干扰评估。 （3）分析GNSS信号的波形调制，提出C频段采用最小频移键控及二进制编码符号（Minimum Shift Keying-Binary Code Symbol，MSK-BCS）调制波形的兼容性优于传统导航信号调制波形，而S频段采用一般二进制偏移载波调制（Generalised Binary Offset Carrier，GBOC）调制波形时，兼容性能也有所改善。 （4）基于Weil序列生成与GPS L1C信号的扩频码奇偶自互相关性能相当的10230长度扩频码序列，提出一种新型扩频码生成方法，并通过优化算法获得100组优良性能的长度为4092的扩频码；针对L频段GNSS信号中心频点重叠严重问题，以扩频码的相关特性为基础提出GNSS信号扩频码兼容评估概念，给出评估参数，建立扩频码兼容分析的数学模型和接收机模型，并对GNSS信号的扩频码进行兼容评估。 本文研究的创新点主要体现在以下方面： （1）采用通用评估方法，对L、C、S频段GNSS系统内和系统间信号进行兼容评估；对L、C、S频段GNSS信号与所有相邻频段射频信号进行干扰评估。 （2）采用GNSS信号新型调制波形MSK-BCS和GBOC分析其在C频段和S频段的兼容性能表现，结果表明兼容性能有较大改善。 （3）提出一种新的扩频码生成方法，利用扩频码优化快速算法，得到100组长度为4092的扩频码，其自相关性能明显优于同长度的Galileo E1OS信号扩频码，互相关性能与之相当；提出扩频码兼容评估概念，使得兼容评估结果更加全面完善。
[Abstract]:The establishment of the Global Positioning System (GPS) has brought great changes to the navigation, positioning and time-service technology of the world. Russia, Europe and China have also successively developed their own independent L-band Global Navigation Satellite System (GNSS). Compared with the L-band GNSS signal, the C-band signal has the advantages of anti-ionosphere effect and good anti-multipath performance, can provide more secure service performance to important sectors and industries such as aviation, financial and electric power with high signal quality, and the advantages of the S-band navigation service and other mobile and wireless service integration on the frequency band also cause the development and the construction of the S-band GNSS in the countries, and the coexistence of a plurality of navigation satellite system signals in the future C and S frequency band can not be ignored, and the interference of the radio-frequency signals on the frequency bands is inevitable, Therefore, the research on the compatibility of multi-band GNSS signals is of great significance to the construction and development of L, C and S-band navigation satellite systems. On the basis of the research contents of the "Research on GNSS-compatible Interoperability and New Signal System" and the special subject "Study on the Compatibility of the GNSS L/ S/ C-band" of the 863 subject project, the compatibility of the L, C and S frequency band GNSS signals is analyzed and verified in a comprehensive way, and the compatibility analysis technology of the GNSS signal and the out-of-band radio frequency signal is improved. In this paper, the design technique of GNSS signal modulation and spreading code is deeply studied, the influence of the modulated signal on the compatibility is analyzed, and the new design method of spreading code and the concept of the compatibility of spread spectrum code are put forward. The content of this paper is mainly divided into the following four parties: (1) The model and method of GNSS signal compatibility evaluation are analyzed comprehensively, and the compatibility evaluation based on the spectral separation coefficient (SSC) and the code tracking spectrum sensitivity coefficient (CT _ SSC) is respectively constructed. The method for estimating the compatibility of the GNSS signals of the L, C and S frequency bands is established by using the estimation model, and the compatibility of each frequency band is calculated by the simulation, and the result is Line assessment. (2) Analysis of interference characteristics of L, C, S-band GNSS signals and adjacent radio-frequency signals, model and method for determining interference assessment, and interference assessment, including interference assessment of L-band GNSS signals and radio astronomy (RA); C-band GNSS Signal and RA, and the interference assessment of the Microwave Landing System (MLS); S-band GNSS signals and Globalstar systems, Fixed Service (FS), and Worldwide Interoperability for Microwave Access (WiMAX) (3) The waveform modulation of the GNSS signal is analyzed, and the compatibility of the modulation waveform with the minimum frequency shift keying and the binary code symbol (MSK-BCS) in the C-band is better than that of the conventional navigation signal, and the general binary offset carrier modulation is adopted in the S-band. Carrier, GBOC) modulated waveform, compatible and (4) generating a 10230-length spreading code sequence corresponding to the spreading code parity and the odd-even self-correlation performance of the GPS L1C signal based on the Weil sequence, proposing a novel spreading code generation method, and obtaining the length of 100 sets of excellent performance by an optimization algorithm, A spread-spectrum code of 4092 is proposed. In order to solve the serious problem of the central frequency point of the GNSS signal in the L-band, the concept of the compatibility evaluation of the spread-spectrum code of the GNSS signal is put forward based on the correlation characteristic of the spread-spectrum code, the evaluation parameters are given, the mathematical model and the receiver model for the compatibility analysis of the spread-spectrum code are set up, and the GNSS signal is A compatible evaluation of spreading codes. The new point is mainly reflected in the following aspects: (1) The general evaluation method is adopted to carry out the compatibility evaluation on the signals between the L, C and S frequency band GNSS systems and the system; and the GNSS signals of the L, C and S frequency band and all the phases (2) The compatibility between the C-band and the S-band is analyzed by using the new modulation waveform MSK-BCS and GBOC of the GNSS signal. The results show that the compatibility can be improved greatly. (3) A new method of spreading code is proposed, and the spreading code is optimized by using the spreading code to obtain the spreading code with the length of 4092. The self-correlation performance is better than that of the same length of the Galileo E1OS signal spreading code and the cross correlation. to be comparable to it; to propose a spread-spectrum-code-compatible evaluation
【学位授予单位】：上海交通大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN96.1
本文编号：2431552
[Abstract]:The establishment of the Global Positioning System (GPS) has brought great changes to the navigation, positioning and time-service technology of the world. Russia, Europe and China have also successively developed their own independent L-band Global Navigation Satellite System (GNSS). Compared with the L-band GNSS signal, the C-band signal has the advantages of anti-ionosphere effect and good anti-multipath performance, can provide more secure service performance to important sectors and industries such as aviation, financial and electric power with high signal quality, and the advantages of the S-band navigation service and other mobile and wireless service integration on the frequency band also cause the development and the construction of the S-band GNSS in the countries, and the coexistence of a plurality of navigation satellite system signals in the future C and S frequency band can not be ignored, and the interference of the radio-frequency signals on the frequency bands is inevitable, Therefore, the research on the compatibility of multi-band GNSS signals is of great significance to the construction and development of L, C and S-band navigation satellite systems. On the basis of the research contents of the "Research on GNSS-compatible Interoperability and New Signal System" and the special subject "Study on the Compatibility of the GNSS L/ S/ C-band" of the 863 subject project, the compatibility of the L, C and S frequency band GNSS signals is analyzed and verified in a comprehensive way, and the compatibility analysis technology of the GNSS signal and the out-of-band radio frequency signal is improved. In this paper, the design technique of GNSS signal modulation and spreading code is deeply studied, the influence of the modulated signal on the compatibility is analyzed, and the new design method of spreading code and the concept of the compatibility of spread spectrum code are put forward. The content of this paper is mainly divided into the following four parties: (1) The model and method of GNSS signal compatibility evaluation are analyzed comprehensively, and the compatibility evaluation based on the spectral separation coefficient (SSC) and the code tracking spectrum sensitivity coefficient (CT _ SSC) is respectively constructed. The method for estimating the compatibility of the GNSS signals of the L, C and S frequency bands is established by using the estimation model, and the compatibility of each frequency band is calculated by the simulation, and the result is Line assessment. (2) Analysis of interference characteristics of L, C, S-band GNSS signals and adjacent radio-frequency signals, model and method for determining interference assessment, and interference assessment, including interference assessment of L-band GNSS signals and radio astronomy (RA); C-band GNSS Signal and RA, and the interference assessment of the Microwave Landing System (MLS); S-band GNSS signals and Globalstar systems, Fixed Service (FS), and Worldwide Interoperability for Microwave Access (WiMAX) (3) The waveform modulation of the GNSS signal is analyzed, and the compatibility of the modulation waveform with the minimum frequency shift keying and the binary code symbol (MSK-BCS) in the C-band is better than that of the conventional navigation signal, and the general binary offset carrier modulation is adopted in the S-band. Carrier, GBOC) modulated waveform, compatible and (4) generating a 10230-length spreading code sequence corresponding to the spreading code parity and the odd-even self-correlation performance of the GPS L1C signal based on the Weil sequence, proposing a novel spreading code generation method, and obtaining the length of 100 sets of excellent performance by an optimization algorithm, A spread-spectrum code of 4092 is proposed. In order to solve the serious problem of the central frequency point of the GNSS signal in the L-band, the concept of the compatibility evaluation of the spread-spectrum code of the GNSS signal is put forward based on the correlation characteristic of the spread-spectrum code, the evaluation parameters are given, the mathematical model and the receiver model for the compatibility analysis of the spread-spectrum code are set up, and the GNSS signal is A compatible evaluation of spreading codes. The new point is mainly reflected in the following aspects: (1) The general evaluation method is adopted to carry out the compatibility evaluation on the signals between the L, C and S frequency band GNSS systems and the system; and the GNSS signals of the L, C and S frequency band and all the phases (2) The compatibility between the C-band and the S-band is analyzed by using the new modulation waveform MSK-BCS and GBOC of the GNSS signal. The results show that the compatibility can be improved greatly. (3) A new method of spreading code is proposed, and the spreading code is optimized by using the spreading code to obtain the spreading code with the length of 4092. The self-correlation performance is better than that of the same length of the Galileo E1OS signal spreading code and the cross correlation. to be comparable to it; to propose a spread-spectrum-code-compatible evaluation
【学位授予单位】：上海交通大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN96.1
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