B码应用深入探讨  

In-Depth Research on B-Code Application

作　　者：戎强[1,2] 刘铁强[1,2] 贾杰峰[1,2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北省卫星导航技术与装备工程技术研究中心,河北石家庄050081

出　　处：《全球定位系统》2014年第4期55-59,68,共6页Gnss World of China

摘　　要：在介绍B码构成与原理的基础上,分析了B码时统典型应用实例,针对B码应用中常见的无法跨年和闰秒、B码中断与恢复时存在时间错误、受扰时间跳变、交流B码幅度与调制比受限等问题,提出了B码版本切换与软件跨年及闰秒、强制守时、解码容错、交流B码数控幅度与调制比等解决方法。工程实践表明:这些方法可有效解决B码应用中遇到的对应问题,有效提高了B码时统的稳定性和可用性,具有很好的实用价值。Based on the introduction of the B-code structure and principal, this paper an- alyzes the typical application of the B-code. Considering the regular problems during the B- code application, such as unable change the year, time error occurs while B-code recovers from its halted state, time hip being disturbed, AC B-code amplitude and modulation ratio being limited. This paper advanced some settlements, they are B-code version switching and software change the year, force time-holdover, decoding fault-tolerance, and numerical control amplitude and modulation ratio adjustment. Projects application indicates that these set tlements can efficiently solve these problems during B-code application, and can greatly improve the stability and the usability of the B-code system. So it has a good practical value.

关 键 词：版本切换 强制守时 解码容错 数控幅度与调制比 

分 类 号：TN919.3[电子电信—通信与信息系统]