摘要
在单光源逆向调制(modulating retro-reflector,MRR)自由空间光通信(free-space optical,FSO)系统中,光收发端在接收MRR端上行再调制信号时,会受到自身下行信号的串扰,导致系统误码率性能恶化。本文提出采用组合逻辑(combinatorial logic,CL)反向脉位调制(inverse pulse position modulation,IPPM)方案来消除下行信号对上行再调制信号的串扰,进而降低单光源MRR FSO通信系统误码率。本项研究设计了基于CL-IPPM的单光源MRR FSO通信实验装置,进行了仿真及全双工通信实验。实验结果表明,使用CL-IPPM方案的单光源MRR FSO系统增益约5 dB。同时,光收发端和MRR端均采用IPPM时,CL-IPPM方案可获得较好的误码率性能。此外,本文利用微角锥棱镜阵列的伪相位共轭特性来提升该系统的鲁棒性,将CL-IPPM方案与微角锥棱镜阵列结合应用于单光源MRR FSO通信系统,可实现弱/中湍流强度下误码率为10^(-3)以下的全双工通信。
In a single-source modulation retro-reflector(MRR)free-space optical(FSO)system,the downlink signal causes crosstalk to the uplink remodulation signal of MRR terminal received by transceiver terminal,causing the system′s bit error rate performancetodeteriorate.Inthispaper,we propose to use combinatorial logic(CL)inverse pulse position modulation(IPPM)scheme to eliminate the crosstalk of the downlink signal to the uplink remodulation signal to reduce the bit error rate of the single-source MRR FSO communication system.In this study,we built a CL-IPPM-based single-source MRR FSO communication experiment platform,and did simulation and full-duplex communication experiment based on it.The results show that the single-source MRR FSO communication system using the CL-IPPM scheme has a gain of about 5dB.Furthermore,when the transceiver terminal and MRR terminal adopted IPPM,CL-IPPM scheme has the best bit error rate performance.Inaddition,we used the pseudo-phase conjugation property of the micro-corner cube retro-reflector array to improve the robustness of the MRR FSO system,and combining the CL-IPPM and the micro-corner cube retro-reflector array,the full-duplex communication based on single-source MRR FSO system can be realized with a bit error rate of 10^(-3) or less under weakly and medium turbulent environment.
作者
陈天宁
杨国伟
滕旭阳
毕美华
CHEN Tianning;YANG Guowei;TENG Xuyang;BI Meihua(School of Communication Engineering,Hangzhou Dianzi University,Hangzhou,Zhejiang 310016,China;National Laboratory on Local Fiber-optic Communication Network and Optical Communication System,Shanghai Jiaotong University,Shanghai 200240,China)
出处
《光电子．激光》
CAS
CSCD
北大核心
2022年第2期208-216,共9页
Journal of Optoelectronics·Laser
基金
浙江省自然科学基金(LY20F050004)
浙江省教育厅一般科研项目(Y201942093,Y201942104,Y202044258)资助项目。
关键词
组合逻辑
逆向调制
大气湍流
自由空间光通信
微角锥棱镜阵列
combinatorial logic
modulating retro-reflector
atmospheric turbulence
free-space optical communication
micro-corner cube retro-reflector array
