论文部分内容阅读
给出了一种采用全光放大转发中继的双跳自由空间光(FSO)通信系统的基本结构,假定采用副载波强度调制,考虑背景噪声对系统性能的影响,导出了在Gamma-Gamma大气湍流复合信道下系统的误码率(BER)和中断概率闭合表达式。通过仿真对比分析了采用全光放大转发中继的FSO系统与电放大转发中继FSO的中断概率及误码率,并且分析了大气湍流、信噪比(SNR)等参数对全光中继系统性能的影响。结果表明,采用全光放大转发中继的系统性能优于电放大转发中继;可以通过优化波束宽度使得全光中继的系统性能达到最优。
A basic structure of a double-hop free-space optical (FSO) system using all-optical amplification and repeater relay is given. Assuming the effect of background noise on the system performance using sub-carrier intensity modulation, the influence of background noise on the system performance is derived. In the Gamma-Gamma atmosphere BER (Bit Error Rate) and Interruption Probability Closed-form Expressions in a System with Turbulent Composite Channels. Through the simulation, the disruption probability and bit error rate of the FSO system with all-optical amplifying and repeater relay and the repeater FSO are compared and analyzed. The effects of atmospheric turbulence, signal-to-noise ratio (SNR) and other parameters on the optical relay system The impact of performance. The results show that the system using all-optical amplification and repeater relay is better than the electrical amplification and repeater; the system performance of all-optical relay can be optimized by optimizing the beamwidth.