• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>China satellite navigation conference >A Spread Spectrum Communication Method Based on GNSS Positioning and Timing System
【24h】

A Spread Spectrum Communication Method Based on GNSS Positioning and Timing System

机译：一种基于GNSS定位和定时系统的扩频通信方法

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Application of spread spectrum technology can effectively solve the problem of power constraints in satellite communication. A difficulty of spread spectrum communication is fast acquisition of spread spectrum signal. For the lack of priori information, code phase and frequency offset are both random quantities, it usually takes a long time in signal acquisition, which would reduce the efficiency of the communication especially for the burst communication. Traditional methods realized spread spectrum signal fast acquisition at the expense of acquisition algorithm complexity and hardware resources cost. This article presents a low cost new code phase and carrier frequency of spread spectrum signal correction method that is easy to implement based on GNSS positioning and timing system. In order to correct the frequency offset and code phase difference, position and time information given by GNSS system are used to build the network-wide time synchronization system and indirect loopback correction system in ground station. At the same time, with the aid of satellite timing, the influence of clock error is eliminated in the way of DDS. With the above measures, the spread spectrum signal fast acquisition could be realized in the network-wide time synchronization system.
机译：扩频技术的应用可以有效解决卫星通信中的功率约束问题。扩频通信的难度是快速获取扩频信号。为了缺少先验信息，代码阶段和频率偏移都是随机的数量，通常在信号采集中需要很长时间，这将降低突发通信的通信效率。传统方法以采集算法复杂性和硬件资源成本为代价实现扩频信号快速采集。本文介绍了扩频信号校正方法的低成本新码相和载波频率，易于基于GNSS定位和定时系统实现的易于实现。为了校正频率偏移和代码相位差，GNSS系统给出的位置和时间信息用于构建地面站的网络宽时间同步系统和间接环回校正系统。同时，借助卫星定时，以DDS的方式消除了时钟误差的影响。通过上述措施，可以在网络范围的时间同步系统中实现扩频信号快速采集。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号