摘要
分析"北斗"2代卫星导航系统B1I信号的构成,说明调制在D1导航电文上的二次编码的作用,介绍导航电文的纠错编码方式和编码原理,对BCH编码的纠错原理和纠错性能进行详细分析和计算,证明了导航电文采用的纠错编码方式能满足信息传输准确性的要求。
The composing of BeiDou II BII signal is analyzed. The function of secondary code which is modulated with D1 navigation message is illuminated. The error correcting coding mode and the principle of navigation message are introduced. The error correcting principle and the performance of BCH codes are analyzed and calculated in detail. The results show that the mode of error correcting coding of navigation message can satisfy the veracity of message transmission.
出处
《航天电子对抗》
2013年第6期30-32,共3页
Aerospace Electronic Warfare
关键词
“北斗”2代
卫星导航系统
导航电文
二次编码
纠错
BeiDou II
satellite navigation system
navigation message
secondary code
correction
