量子定位系统在沙尘暴背景下的最优纠缠度自适应策略  

Optimal entanglement degree adaptive strategy for quantum positioning system in the context of sandstorm

作　　者：马虎森 聂敏 杨光 张美玲 孙爱晶 裴昌幸[2] MA Husen;NIE Min;YANG Guang;ZHANG Meiling;SUN Aijing;PEI Changxing(School of Communications and Information Engineering,Xi'an University of Posts and Telecommunications,Xi'an,Shaanxi 710121,China;State Key Laboratory of Integrated Services Networks,Xidian University,Xi'an,Shaanxi 710071,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《光电子．激光》2024年第8期861-867,共7页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61971348);陕西省自然科学基础研究计划项目(2021JM-464)资助项目。

摘　　要：量子定位系统(quantum positioning system,QPS)具有定位精度高、安全系数高的特点,然而沙尘暴会使得光量子纠缠度产生较大变化,进而影响到量子定位系统的定位误差。为了降低这种误差,本文基于双卫星星地链路切换策略提出了抵抗沙尘暴干扰的最优纠缠度自适应(optimal entanglement degree adaptive,OEDA)策略。建立了沙尘暴各参数、传输距离与纠缠度之间的关系,并且将沙尘暴整体特征对系统的定位误差在自适应调整前后进行对比。仿真结果表明,当沙尘暴整体特征聚合因子为10,传输距离为10 km时,采用OEDA算法后,系统定位误差由0.14 m缩减至0.02 m,因而可知经过OEDA策略后可以提高沙尘暴天气下QPS的精确度。Quantum positioning sstem(QPS)has the characteristics of high positioning accuracy and high safety factor.However,sandstorm can cause great changes in optical quantum entanglement degree,which will further affect the positioning error of quantum positioning system.In this case in order to reduce the positioning error,an optimal entanglement degree adaptive(OEDA)strategy to resist sandstorm interference is proposed based on switching strategy of dual-satellite satellite-ground link.The relationships between each parameter of the sandstorm,transmission distance and the entanglement degree are established.And the positioning error caused by the global feature of sandstorm is compared before and after the adaptive adjustment of the system.The simulation results show that when the overall characteristic aggregation factor of sandstorm is 10 and the transmission distance is 10 km,the system positioning error is reduced from 0.14 m to 0.02 m by using OEDA algorithm.Thus it is known that the accuracy of QPS in sandstorm can be improved by using OEDA strategy.

关 键 词：量子光学 量子定位系统 纠缠度 沙尘暴 自适应 

分 类 号：G301[文化科学]