雷暴云背景下星地量子通信链路多参数融合寻优策略

Multi-parameter fusion optimization strategy for star-ground quantum communication links in the context of thunderstorm clouds

为降低雷暴云对星地量子通信链路的影响,提出了一种基于多参数融合的星地量子通信链路切换策略。仿真分析了雷暴云中大气带电粒子浓度和观测高度对量子纠缠度、信道容量以及链路误码率之间的关系。将量子纠缠度、信道容量、链路误码率这三个参数进行加权并利用该加权因子的阈值来寻找当前时刻最优卫星接入星地量子通信链路中。仿真结果表明,使用参数加权融合因子来进行链路切换可以提高切换的成功率,并改善切换过程中掉话率高的问题。因此,采用参数加权融合因子来进行链路切换,对星地量子通信链路的可靠性有明显改善。

To reduce the impact of thunderstorm clouds on the star-ground quantum communication link,this pa-per proposes a multi-parameter fusion-based switching strategy for the satellite-ground quantum communication link.The relationship between atmospheric charged particle concentration and observation height in thunderstorm clouds on quantum entanglement degree,channel capacity,and link BER is simulated and analyzed.The three parameters of quantum entanglement,channel capacity,and link BER are weighted and the threshold value of the weighting factor is used to find the optimal satellite access to the satellite-ground quantum communication link at the current moment.Simulation results show that using the parameter-weighted fusion factor for link switching can improve the success rate of switching and improve the problem of high call drop rate during switching.Therefore,the use of a parameter-weigh-ted fusion factor for link switching can significantly improve the reliability of the satellite-ground quantum communica-tion link.