GPS L5信号帧同步方法的设计与实现  

Design and implementation of GPS L5 signal frame synchronization method

作　　者：曾辉艳 马颖莉 陈伟波 常敏 ZENG Huiyan;MA Yingli;CHEN Weibo;CHANG Min(Beijing Research Institute of Telemetry,Beijing 100076,China)

机构地区：[1]北京遥测技术研究所,北京100076

出　　处：《遥测遥控》2019年第6期50-55,76,共7页Journal of Telemetry,Tracking and Command

基　　金：北斗导航系统重大专项。

摘　　要：为了实现电文数据的帧同步,给出了GPS L5信号帧同步方法的设计思路,利用GPS L5两个信号分量的同步关系,实现L5I信号的处理并得到电文编码符号。基于咬尾卷积码译码算法和VCP2译码器核完成译码并得到电文数据,最后完成电文数据的帧同步。测试结果显示GPS L5信号的帧同步跟踪稳定,从帧同步中获取的电文帧正确无误且实现定位。方法充分利用信号自身的同步特性关系和现有硬件资源,具有计算量小、资源耗费少和硬件易实现的优点。This paper presents the design idea of GPS L5 signal frame synchronization in GPS L5 receiver.The method uses the synchronization relation of two signal components of GPS L5 signal to realizes L5I signal processing and gets the message coding symbol.Based on the decoding algorithm of the tail-biting convolutional code and VCP2,the decoding is completed and the message data is obtained.Finally the frame synchronization of message data is completed.Test results show that the frame synchronization tracking is stable,and the message frames obtained from the frame synchronization are correct and can be used to position.This method makes full use of the synchronization characteristics of the signal itself and existing hardware resources,and has the advantages of small computation,low resource consumption and easy hardware realization.

关 键 词：GPS L5信号 咬尾卷积码 译码 帧同步 

分 类 号：P228[天文地球—大地测量学与测量工程]