空间分集技术在航空激光通信中的应用研究  

Application of Spatial Diversity Technology for Airborne Laser Communication

作　　者：赵静[1] 赵尚弘[1] 李勇军[1] 赵卫虎[1] 刘韵[1] 李轩[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《激光与光电子学进展》2015年第8期102-107,共6页Laser & Optoelectronics Progress

基　　金：中国博士后科学基金(2012M512066)

摘　　要：研究了采用空间分集技术补偿机间激光通信链路中的大气湍流影响。基于直接相干探测接收分集系统模型,分析了最佳合并(OC)接收分集的功率增益和中断概率性能,并与等增益合并(EGC)分集和最大选择合并(SMC)分集系统进行了比较。分析结果表明:在强湍流条件和低中断概率时,OC和EGC可获得较高的功率增益,且明显优于SMC系统,其中OC系统性能相对EGC具有优势,二者性能相差较小,但是OC实现方式较复杂,因此实际航空激光通信工程应用中应综合考虑分集技术进行选择。The spatial diversity can be used to mitigate atmospheric turbulence over airborne optical links. Based on the direct detection receivers, the outage probability and power gain of optimal combining （OC） spatial diversity are compared with those of equal gain combining （EGC） and select-max combining （SMC） diversity. The power gain of these diversity systems is found to be substantial, and the performance of optimal combining is better than those of equal combining and select-max combining, as the performance of equal combing is found to be almost as good as that of optimal combining. But optimal combining is more difficult to implement. Hence the diversity technology should be chosed after comprehensive consideration in actual airborne laser communication envino^rin~ ur）r~｜ie^tinn~

关 键 词：光通信 航空激光通信 大气湍流 空间分集 相干探测 

分 类 号：TN929.12[电子电信—通信与信息系统]