星际高速激光通信中时钟同步技术研究  

Clock synchronization technology on interstellar high speed laser communication

作　　者：张彬[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学仪器》2016年第1期79-84,共6页Optical Instruments

摘　　要：讨论了星际激光通信中脉冲位置调制技术中的时钟同步方案。脉冲宽度调制方案旨在实现信噪比约束下的最大数据传输速率。时钟同步是脉冲宽度调制的核心技术,利用统计鉴相机制实现调制和解调端的时钟同步。本文在深入分析激光通讯时钟同步方案的基础上,建立了时钟抖动的数学模型,并在此基础上分析了数据传输速率与时钟同步的权衡关系,对激光通讯系统设计具有一定的指导意义。Clock synchronization technology of pulse position modulation(PPM)modulation is discuss in this paper.The main target of PPM modulation scheme is to gain the fastest data transition speed.Clock synchronization plays an important role in the PPM modulation scheme.Statistic phase detection technology is used in the clock synchronization to achieve the timing requirement between modulation and demodulation.The theory model about clock jitter is provided,and its influence with PPM modulation parameters is discussed.The relationship between clock synchronization and data stream timing requirement is provided.The analytical results have some guidance which is significant to the interstellar high speed laser design.

关 键 词：PPM 激光通讯 数据传输 时钟同步 

分 类 号：TN201[电子电信—物理电子学]