摘要
介绍的低频时码系统是指在罗兰C导航系统中的脉冲相位编码调制的基础上,引入平衡脉冲位移调制,发播标准时间和导航信息的一种方法。设计了一低频时码信号模拟器,该低频时码可以用于基于罗兰C的组合导航系统中。在设计中考虑到罗兰C导航易受多种信号干扰的实际情况,应用了具有一定帧同步能力的CRC、RS编码方式,在此基础上介绍了这种低频时码模拟器的一种实现方案。
The paper designs a low frequency time code simulation signal source, the signal of which can be used in Loran-C integrated navigation system, and is based on Loran-C pulse phrase modulation, and adds pulse position modulation. Considering the disadvantage of which Loran-C is easy to be disturbed by all kinds of noise signals, applies CRC and RS encode method provided with the ability of frame in-phrase and introduces a method of the design and implement of the low frequency time code navigation signal simulation signal source.
出处
《宇航计测技术》
CSCD
2005年第3期32-36,共5页
Journal of Astronautic Metrology and Measurement
关键词
^+低频时码
信号模拟器
^+前向纠错
^+三态脉冲位移调制
罗兰C导航
+Low frequency time code Signal simulation source +Forward error correcting +Three states pulse position modulation Loran-C navigation
