可变基频激光通信数据传输系统研究与实现

摘要

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 frequen-cy modulation were analyzed.Frame structure of signals and implementation of ASK encoding and decoding in base-band frequency hopping laser communication were studied.Technical implementation of frequency hopping communi-cation 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 modula-tion 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.%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。