基于双量子数调制光通信系统的噪声滤除

Noise Filtering of Optical Communication Systems Based on Two Modulated Quantum Numbers

针对无线光通信中背景噪声和干扰噪声影响的问题,提出了双量子数调制的通信系统,展示了基于轨道角动量自由度调控实现噪声滤除的物理机理,还研究了大气湍流环境下的信噪比提升效果和信号利用率。结果表明,对于不同的湍流强度和调制量子数,信噪比可以提升几倍到几十倍。此外,在任意湍流强度的情况下,系统的信号利用率均大于50%。当调制量子数较大时,信号利用率接近100%。

This paper focuses on the impacts of background and jamming noise in wireless optical communications and proposes a communication system with two modulated quantum numbers.The physical mechanism of noise filtering based on the control of degree of freedom of orbital angular momentum is showed,and the effects of improved signal-to-noise ratio and signal utilization in atmospheric turbulence are studied.The results show that the signal-to-noise ratio can be improved by several times and even more for different turbulence intensities as well as modulated quantum numbers.In addition,the signal utilization of the system is more than 50%under any turbulence intensity.When the modulated quantum numbers are large,the signal utilization of the system approaches to 100%.