基于PPM同步序列的大气激光通信系统  

Atmospheric laser communication system based on PPM synchronization sequence

作　　者：敖珺[1] 唐德刚 马春波[1] 盛均峰 AO Jun;TANG Degang;MA Chunbo.SHENG Junfeng(School of Information and communication,Guilin University of Electronic Technology,Guilin Guangxi 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《光通信技术》2018年第9期33-36,共4页Optical Communication Technology

基　　金：国家自然科学基金资助课题(61167006)资助

摘　　要：基于脉冲位置调制(PPM)的大气激光通信系统的关键问题之一在于帧同步。针对传统帧同步技术中对采样信号采取门限判决而导致丢帧的问题,提出了一种基于采样值累加并进行两端比较的帧同步方法。设计了一套基于数字信号处理(DSP)芯片和现场可编程门阵列(FPGA)为数据处理核心的大气激光通信系统,并对上述帧同步方法进行了测试,验证了其可行性。One of the key issues of pulse position modulation（PPM） atmospheric laser communications systems is frame synchronization technique. To solve the problem of frame dropping caused by threshold decision on the sampled signal in the traditional frame synchronization technique, a frame synchronization algorithm based on sampling accumulated values for two-end comparison is proposed. An atmospheric laser communication system based on digital signal processing（DSP） chip and field-programmable gate array（FPGA）as data processing core is designed, and the above frame synchronization algorithm is tested to verify its feasibility.

关 键 词：脉冲位置调制 帧同步 门限判决 大气激光通信 

分 类 号：TN929.12[电子电信—通信与信息系统]