上海交通大学学报

上海交通大学学报（自然版）

• 无线电电子学、电信技术 • 上一篇    下一篇

基于多卫星伽利略E1频段中频信号的生成方法

吴中杰，茅旭初
  

  1. （上海交通大学 仪器科学与工程系， 上海 200240）
  • 收稿日期:2009-12-09 修回日期:1900-01-01 出版日期:2010-09-28 发布日期:2010-09-28

A Method of Intermediate Frequency Galileo E1 Signal

Generating Based on MultiSatellites
WU Zhongjie，MAO Xuchu
  

  1. (Department of Instrument Science and Engineering, Shanghai Jiaotong University,
    Shanghai 200240, China)
  • Received:2009-12-09 Revised:1900-01-01 Online:2010-09-28 Published:2010-09-28

摘要： 为了模拟二进制偏移载波BOC（1，1）调制下的多卫星伽利略信号，提出了一种伽利略E1频段数字中频信号的生成方法.其中，通过模块化和图形化设计，逐层细化而拟合伽利略信号所需步骤，包括扩频码的产生、BOC调制的实现以及导航信息、载波和可调噪声源的叠加，并通过信号的自相关及其捕获等处理.结果表明，所生成的信号具有伽利略E1频段BOC（1，1）调制的信号特征，其信噪比和多普勒频移可调，可用于软件接收机的信号处理解算.

关键词: 伽利略导航系统, 中频信号, 二进制偏移载波, 信号捕获

Abstract: A method to generate Galileo E1 intermediate frequency (IF) digital signal for simulation of Galileo signal based on multisatellites with BOC (1,1) modulation was presented. This Galileo IF digital signal can serve as reliable data resource in the research of development of software receiver and highsensitivity Galileo receiver based on weak signal processing. The simulink models of Galileo IF signal was designed according to signal generation module needed in signal generator. Then Galileo IF signal was generated by PRN code, BOC modulation, navigation data of multisatellites, and carrier and modulated noise model with adjustable intensity. The experimental results by signal processing with autocorrelation and signal acquisition show that Galileo IF signal with adjustable carriertonoise ratio and Doppler shift has all the characteristics of BOC modulation and real Galileo signal, and that it can be used in signal processing in software receiver.

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