摘要
自由空间光通信技术因优点显著目前已经获得了极大的发展,其具有免频谱许可证、安全传输、大容量和低部署成本的特点。然而,光信号在经历大气信道的传输过程中会受到大气湍流效应的影响而发生衰减和波动,这种现象称为闪烁效应,会大大降低系统的传输性能。研究了提取信号中直流分量作为连续波参考光的技术,并将其应用到自由空间光通信系统中。得出了在信道为对数正态分布模型下的误码率模拟结果,并详细分析了通过提取直流信号作为参考波后的性能改进。
Free-space optical（FSO） communication has many advantages including high capacity,high security,free spectrum license and easy to install and remove.However,due to the inhomogeneity of temperature and pressure fluctuations,the intensity of an optical wave will fluctuate when it propagates through the atmosphere.Such fluctuation is known as scintillation,which can deteriorate the FSO transmission performance severely.we have studied the DC extract technology,and apply it to free-space optical communications as a reference continuous wave light（RCWL）.In this paper,the BER simulation results are presented,and the performance improvement by extracting the DC signal as a reference wave is analyzed in detail.
出处
《微型机与应用》
2016年第13期67-70,共4页
Microcomputer & Its Applications
关键词
自由空间光通信
大气湍流效应
直流提取
连续波参考光
free-space optical communications
atmospheric turbulence
DC extract
reference continuous wave light
