PPM调制光纤耦合多孔径接收系统性能研究  

Research on Performance of Fiber-Based Multiple Apertures Receiver System with PPM Modulation

作　　者：李康宁 冯旭[1] 高建文 马晶[2] LI Kangning;FENG Xu;GAO Jianwen;Ma Jing(China Academy of Electronics and Information Technology,Beijing 100041,China;Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]中国电子科学研究院,北京100041 [2]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《天地一体化信息网络》2021年第2期62-68,共7页Space-Integrated-Ground Information Networks

摘　　要：研究空间激光通信脉冲位置调制(PPM)光纤耦合多孔径接收系统的通信性能,在Gamma-Gamma光强分布大气模型和非中心卡方分布光纤耦合效率分布模型基础上,给出PPM光纤耦合多孔径接收系统经大气链路传输的信噪比和平均误码率表达式。多孔径接收合并方式考虑了选择性合并(SC)、等增益合并(EGC)以及最大比合并(MRC)3种。通过Monte Carlo仿真,对比分析地面链路4PPM调制SC、EGC和MRC光纤耦合多孔径接收系统和等接收面积单孔径接收系统的误码率,对比研究4PPM调制和8PPM调制多孔径接收系统在不同合并方式下的误码率性能。The performance of fi ber-based FSO with multiple apertures receiver system was studied for pulse position modulation(PPM).Expressions of PPM modulated signal-to-noise ratio(SNR)and bit-error rate(BER)for fi ber-based FSO multiple apertures receiver system were presented based on the probability density function of Gamma-Gamma intencity distribution and non–central chisquare fi ber coupling effi ciency distribution under atmospheric infl uence.Selection combining(SC),equal gain combining(EGC)and maximum ratio combining(MRC)were considered to be three signal combining methods for multiple apertures receiver system.The BER performance of 4PPM modulted SC,EGC and MRC fi ber-based multiple apertures receiver system and single aperture receiver system with the same total aperture area were comparative analyzed by Monte Carlo simulation.The BER performance of fi ber-based multiple apertures receiver systems in 4PPM and 8PPM modulation modes were directly compared for diff erent combining methods.

关 键 词：空间光通信 大气湍流 多孔径接收 光纤耦合 PPM 

分 类 号：TN929.13[电子电信—通信与信息系统]