相位补偿技术在无线光通信中的应用  

Phase Compensation Technology in Wireless Optical Communication

作　　者：王志华[1] 龚哲兮 郭鹏展[1] 

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《通信技术》2016年第4期413-417,共5页Communications Technology

摘　　要：大气的湍流运动所导致的大气折射率随时间和空间变化会引起大气湍流效应,主要包括光强闪烁、相位波动、光束漂移和光束扩展等,会增大误码率和缩短通信距离。通过研究相位补偿技术提升通信系统性能,建立了相位补偿相干系统模型,分析了相位补偿参数补偿阶数、归一化接收孔径,湍流参数湍流外尺度、功率指数对系统误码率的影响,并找到达到最优误码率的最佳参数,对有效克服大气湍流效应的干扰,保证无线光通信系统正常工作具有十分重要的意义。Atmospheric refractive index, resulted from atmospheric turbulence, would cause atmospheric turbulence effects along with the change of time and space, mainly including intense scintillation, phase fluctuation, beam drift and beam expansion, thus increasing the BER and shortening the communication distance. By studying the phase compensation technology and enhancing the performance of communication system, a coherent phase compensation system model is established. Phase eompensation parameters com- pensation order, normalized receiving aperture, outer scale of turbulence parameter and the impact of pow- er index BER system are all analyzed. Finally, the best parameters to achieve the optimal BER are found, and this of great significance in effectively overcoming the interference of atmospheric turbulence and guar- anteeing the normal operation of wireless optical communication system.

关 键 词：大气湍流 相干探测 相位补偿 相位失真 误码率 

分 类 号：TN929.12[电子电信—通信与信息系统]