基于脉冲拨号的抗抖动激光通信系统设计  

Design of Anti-Jitter Laser Communication System Based on Pulse Dialing Modulation

作　　者：林晨岚 陈香宇 宋欣然 黄国勇[1] LIN Chenlan;CHEN Xiangyu;SONG Xinran;HUANG Guoyong(College of Communication Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学通信工程学院,长春130012

出　　处：《吉林大学学报（信息科学版）》2022年第1期125-131,共7页Journal of Jilin University（Information Science Edition）

基　　金：省级大学生创新实验计划基金资助项目(202010183129)。

摘　　要：为解决自由空间光通信中的时间抖动问题,设计了基于脉冲拨号的激光通信系统。该系统采用脉冲拨号调制方式,与常用的OOK(On-Off Keying)、 PPM(Pulse Position Modulation)调制方式不同,其只需判断脉冲的有无,可以避免时间抖动的影响,对时间间隔的要求较低。通过STM32单片机编程实现发送端的脉冲拨号调制以及接收端的信号判决与差错控制。此外,接收端采用多路接收方法,能有效增大接收面积,减小瞄准误差。测试结果表明,最终得到的激光通信系统响应速度较快、可靠性较高且易于实现,通信距离可达10 m。A laser communication system based on pulse dialing modulation is designed to improve the time jitter performance in free space optical communication. Different from the OOK(On-Off Keying) and PPM(Pulse Position Modulation) methods, this system only needs to distinguish whether there is a pulse or not, which can avoid the influence of time jitter. The system implements the pulse dialing modulation at the transmitter, the signal decision and error control at the receiver through STM32 MCU(Microcontroller Unit) programming. The receiver of this system adopts a method of multi-channel reception. It enlarges the receiving area to reduce the aiming error. The experiment results show that this system is quick-response, reliable and easy to realize, and its communication distance can reach 10 meters.

关 键 词：脉冲拨号 抗抖动 激光通信系统 多路接收 

分 类 号：TN929.12[电子电信—通信与信息系统]