新体制导航信号分析算法设计与实现

发布时间：2018-02-28 16:51

本文关键词： 卫星导航信号分析导航信号有效功率前置滤波器　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：卫星导航定位服务在日常生活、军事活动和科学研究中,其重要作用日益凸显,而GNSS(全球卫星导航系统)的建设、升级、维护,都需要对新体制信号进行分析,从时域、频域、相关特性、功率特性等多方面评估其性能。因此,在新一代GNSS的建设中,研究能够针对多路多调制导航信号的分析算法,有极大的科研意义和应用价值。国内外在相关领域已经进行了一些研究,而本文将简述部分常用分析指标,并详细论述一些还未得到深入研究的重要参数的评估算法,同时,文章将提出具有一定通用性与适应性的算法与结构,以满足对现有各个频点各种恒包络信号以及研究论证中的各类导航信号体制进行分析的需求。本文的主要工作将围绕以下几个方面来开展。1研究新体制导航信号结构,包括BOC信号、BOC衍生信号、单边带偏置信号、恒包络调制等特点。分析并明确这些特点带来的信号分析的难点所在。2建立了新体制导航信号分析的指标体系和对应的算法结构。文章将通过开环分析和闭环分析结构,通过相同的计算结构,对不同频点、不同调制体制、不同恒包络状态的导航信号进行统一的衡量。3实现新体制导航信号分析算法,并通过程序仿真,分析了恒包络状态和高功放工作点设置对信号的影响,以及分析了前置滤波器对信号的影响。本文主要贡献和结论有:1建立了导航信号分析指标体系,并着重讨论了一些重要指标的详细计算方法:T-offset、导航信号调制域分析、有效导航信号功率、带内功率失真等。2设计并实现了针对新体制导航信号的分析算法。算法模块化,且在确保算法精度的同时,具备一定的自由度和通用性,在面对不同体制的导航信号时均能统一分析。3分析了导航载荷恒包络状态与功放工作点设置的取舍、分析了前置滤波器对信号的影响。
[Abstract]:Satellite navigation and positioning services play an increasingly important role in daily life, military activities and scientific research. However, the construction, upgrading and maintenance of GNSS (Global Satellite Navigation system) need to analyze the signals of the new system from the time domain and frequency domain. Therefore, in the construction of a new generation of GNSS, the analysis algorithm of multi-channel and multi-modulation navigation signal can be studied. It has great scientific research significance and application value. Some researches have been carried out in related fields at home and abroad, and some commonly used analysis indexes are briefly described in this paper, and some important parameter evaluation algorithms that have not been studied in depth are discussed in detail, at the same time, In this paper, an algorithm and structure with certain generality and adaptability is proposed. In order to meet the needs of analyzing all kinds of constant envelope signals at various frequency points and all kinds of navigation signal systems in research and demonstration, the main work of this paper will focus on the following several aspects to carry out .1 research on the structure of navigation signal of the new system. Including BOC signal / BOC derivative signal, single sideband bias signal, The characteristics of constant envelope modulation and so on. The difficulty of signal analysis brought by these characteristics is analyzed. 2. The index system and corresponding algorithm structure of the new system navigation signal analysis are established. The open loop analysis and the closed loop analysis structure are adopted in this paper. Through the same calculation structure, the navigation signal analysis algorithm of different frequency points, different modulation systems and different constant envelope states is measured. 3. The algorithm of navigation signal analysis of the new system is realized by program simulation. The influence of constant envelope state and high power amplifier operating point on the signal and the influence of the prefilter on the signal are analyzed. The main contributions and conclusions of this paper are the establishment of the navigation signal analysis index system by 1: 1. The detailed calculation methods of some important indexes, such as: T-offsett, modulation domain analysis of navigation signal, effective power of navigation signal and distortion of in-band power, are discussed in detail. The algorithm is modularized. At the same time, the algorithm has certain degree of freedom and versatility. In the face of navigation signals of different systems, the trade-off between the constant envelope state of navigation load and the operation point setting of power amplifier is analyzed. The influence of the prefilter on the signal is analyzed.
【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】：TN967.1

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