摘要
位同步技术在数字通信中广泛使用,传统的位同步方法基于硬件。文章提出了一种单纯基于软件的位同步和数据恢复方法,该方法利用了副载波频率和码速率之间的倍数关系,可适用于中低速率下的非归零电平码(NRZ-L)、非归零传号码(NRZ-M)、非归零空号码(NRZ-S)、分相电平码(SPL)、分相传号码(SPM)、分相空号码(SPS)等多种脉冲编码调制(PCM)码型。此方法已在数字接收设备中实际应用,取得了良好的效果。
The bit synchronization technology is widely used in digital communications,and the general method of bit synchronization is based on hardware.This paper presents a method of bit synchronization and data recovery that only based on software.The method uses the ratio relationship between the sub-carrier frequency and the bit rate.The method can be used in multiform PCM codes(NRZ-L,NRZ-M,NRZ-S,SPL,SPM,SPS) which are in medium or low bit rate.The method has been used in digital receiver,and gained good effects.
出处
《航天器工程》
2009年第4期54-59,共6页
Spacecraft Engineering
基金
国家重大科技专项工程
关键词
软件
位同步
数据恢复
software
bit synchronization
data recovery