摘要
针对无线光通信特点,提出一种基于基带跳频的激光数字通信方法,分析单基频调制与可变基频调制原理,研究激光跳频通信信号帧结构与ASK编解码方法,探讨利用FPGA进行跳频通信及控制的技术实现,并进行FPGA系统仿真和可变基频激光调制与传输实验。结果表明,采用可变基频的ASK调制编码通信能保证信息传输的安全性,在视距范围内实现了通信控制与字符数据传输,为大气激光通信应用提供一种新的技术途径。
Aiming at the characteristics of wireless optical communication,a laser digital communication method based on baseband frequency hopping is proposed. The principles of single-fundamental and variable fundamental frequency modulation were analyzed. Frame structure of signals and implementation of ASK encoding and decoding in baseband frequency hopping laser communication were studied. Technical implementation of frequency hopping communication and control based on FPGA was discussed. In addition,the FPGA system was simulated and modulation and transmission experiments of variable fundamental frequency laser communication were carried out. The results show that the security of information transmission can be guaranteed by using variable fundamental frequency ASK modulation and encoding,and communication control and character data transmission in the visual range can be realized,which provides a new technical approach for the application of atmospheric laser communication.
出处
《激光与红外》
CAS
CSCD
北大核心
2016年第10期1220-1224,共5页
Laser & Infrared
基金
国家自然科研基金(No.61461014)
广西高校科研基金(NO.KY2015YB098)资助
关键词
激光通信
可变基频调制
FPGA
基带编码
通信控制
laser communication
variable-fundamental frequency modulation
FPGA
baseband coding
communication control
