自适应编码调制技术在大气激光通信中的应用研究  

Applied Research of the AMC Technology in Atmospheric Laser Communication

作　　者：舒芳[1] 敖发良[1] 孙丽华[1] 

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：《微计算机信息》2010年第15期148-149,147,共3页Control & Automation

基　　金：基金申请人:舒芳;项目名称:速度自适应LDPC码在混合FSO/RF通信链路中的应用研究;基金颁发部门:广西区教育厅(2008105950810M407)

摘　　要：在大气激光通信中,采用固定编码调制方式的传输方案不能充分利用信道的时变特性,频带利用率较低。将自适应编码调制技术应用于大气激光通信中,针对当前的信道状态,选取合适的MCS,使系统的整体传输性能达到最优,满足高效可靠传输的目的。详细阐述了不同目标误包率下的信噪比门限值计算方法,仿真给出4种MCS下的自适应设计方案。结果表明:AMC技术可以在保证系统可靠传输的同时提高系统的频谱利用率;且随着目标误包率的降低,系统的平均频谱利用率降低。In the atmosphere laser communication,using of fixed-code modulation mode of transmission can not be fully reflected the time-varying channel characteristics,the frequency utilization is lower.This article applies Adaptive Coded Modulation technology to the atmospheric laser communications,the transmitter selects a suitable MCS according as the current channel state,allowing the system to achieve the overall transmission performance best and meet the purpose of highly efficient and reliable transmission.we elaborate on different target packet error rate of the signal to noise ratio threshold calculation,simulation gives four kinds of MCS design.The results show that：AMC technology can ensure a reliable transmission while improving the spectrum efficiency;and with the reducing of the target packet error rate,the average spectrum utilization reduces.

关 键 词：大气激光通信 自适应编码调制 脉冲编码调制 误码率 

分 类 号：TN929.12[电子电信—通信与信息系统]