光学学报, 2013, 33 (9): 0906004, 网络出版: 2013-08-08
强湍流下多跳自由空间光通信的性能分析
Performance Analysis of Multi-Hop Free Space Optics over Strong Turbulence
光通信 自由空间光通信 多跳传输 大气湍流 指向误差 中断概率 optical communications free space optics multi-hop transmission atmospheric turbulence pointing errors outage probability
摘要
针对串行译码转发(DF)中继传输方式,研究多跳自由空间光通信(FSO)系统的性能。在研究自由光通信信道衰落模型中,主要考虑大气强湍流引起的衰落以及由未对准偏差和路径损耗共同作用引起的接收机光强度的抖动,并把它们建成一个统计模型。在给定天气状况和未对准条件的情形下,推导串行DF中继传输的多跳FSO的端到端中断概率,得到了端到端中断概率的闭合解析表达式。最终数值结果表明,串行DF多跳传输是一种提高FSO性能的十分有前景的技术。推导的解析表达式和仿真结果吻合得很好。
Abstract
The performance of multi-hop free space optics (FSO) is investigated using serial decode-and-forward (DF) relay transmission. While researching the optical channel fading model, a statistical model for the optical intensity fluctuation at the receiver due to the combined effects of strong turbulence-induced fading, misalignment error and pass loss is presented. For given weather and misalignment conditions, the end-to-end outage probability of serial DF multi-hop FSO is derived and a closed-form analytical expression is got. Numerical results show that the serial DF multi-hop transmission is a promising technology to increase the performance of FSO. The derived analytical expression shows excellent agreement with the simulation results.
胡庆松, 黄玉划, 王俊波, 张净, 姜鹏, 苏芹, 宋晓宇. 强湍流下多跳自由空间光通信的性能分析[J]. 光学学报, 2013, 33(9): 0906004. Hu Qingsong, Huang Yuhua, Wang Junbo, Zhang Jing, Jiang Peng, Su Qin, Song Xiaoyu. Performance Analysis of Multi-Hop Free Space Optics over Strong Turbulence[J]. Acta Optica Sinica, 2013, 33(9): 0906004.