指向误差对海上无线光通信误码率性能的影响分析  

Influence of Pointing Error on Bit Error Rate of Free Space Optics System at Sea

作　　者：王红星[1,2] 宋博[1,2] 吴晓军[1,2] 刘敏[1,2] 

机构地区：[1]海军航空工程学院电子信息工程系,山东烟台264001 [2]山东省信号与信息处理重点实验室,山东烟台264001

出　　处：《光学学报》2016年第9期1-10,共10页Acta Optica Sinica

基　　金：山东省"泰山学者"建设工程专项经费(ts20081330);山东省自然科学基金(ZR2013FQ010)

摘　　要：基于近海环境的大气信道测试链路,实时测量了大气湍流中的大气折射率结构常数、光束漂移方差和光束半径等参数的实验数据。对仅考虑湍流影响和考虑指向误差影响的无线光通信的误码率（BER）模型进行对比分析,分析考虑指向误差影响下的BER分别随大气折射率结构常数、光束漂移和光束扩展半径的变化关系。分析结果表明,实际测量的BER分布随着大气折射率结构常数的增大而变大,受到光束漂移和光斑扩展效应的影响,在大气折射率结构常数较小时,实际测量BER较理论计算的BER大10～20个数量级。An atmosphere channel testing link is set up in the marine environment, and the experimental data are tested, including the atmosphere refractive configuration index, the variance of beam drifting and the beam radius. The comparison of free space optics bit error rate （BER） model with none of pointing error and the one with pointing error is carried on. Based on the BER model with pointing error, the BER performance of free space optics system is estimated with the refractive configuration index, beam drifting and beam spreading. Experimental results show that the actual measured BER increases with the atmosphere refractive configuration index. When the atmosphere refractive configuration index is small, the actual measured BER is larger 10 to 20 orders of magnitude than the theoretical calculated BER on account of the effect of beam drifting and beam spreading.

关 键 词：大气光学 光通信 大气湍流 光束漂移 误码率 指向误差 

分 类 号：TN929.12[电子电信—通信与信息系统]