摘要
光通信系统中信道容量决定系统准确传输信息的能力,决定通信性能的好坏。为提升光通信系统性能,提出光通信系统的信道容量估计与分析方法。通过建立光通信系统单次散射模型,检测光通信的信噪比,估算信道容量;在此基础上,分析光信号在传输过程中路径损耗、收发端仰角、接收端偏轴角以及噪声光子数对光通信系统信道容量的影响,确定不同因素对光通信系统信道容量的影响程度,完成光通信系统的信道容量估计与分析。实验结果表明:采用所提方法对光通信系统信道容量进行估计的准确度高达98%,且信道估计的耗时较短,具有一定实际意义。
The channel capacity of an optical communication system determines the ability of the system to transmit information and the communication performance accurately. To improve the performance of the optical communication system,this paper proposes the channel capacity estimation and analysis method of the optical communication system.The single scattering model of optical communication system is established to detect the signal-to-noise ratio of optical communication system and estimate the channel capacity;on this basis,the influence of path loss,the elevation angle of receiving end,off-axis angle of receiving end and the number of noise photons on the channel capacity of the optical communication system are analysed,and the influence degree of different factors on the channel capacity of optical communication system is determined,and the optical communication system is completed Channel capacity estimation and analysis. The experimental results show that the accuracy of the proposed method for channel capacity estimation of the optical communication system is as high as 98%,and the time-consuming channel estimation is short,which has specific practical significance.
作者
姜军
卓嘎
严李强
JIANG Jun;ZHUO Ga;YAN Liqiang(College of Engineering,Tibet University,Lhasa 850000,China)
出处
《激光杂志》
CAS
北大核心
2021年第5期92-96,共5页
Laser Journal
基金
国家自然科学基金项目(No.61461047)
西藏大学校级培育项目(No.ZDTSJH19-02)。
关键词
光通信系统
信道容量
单次散射模型
信噪比
路径损耗
收发端仰角
噪声光子数
optical communication system
channel capacity
single scattering model
signal to noise ratio
path loss
elevation angle of receiver and transmitter
photon number of noise
