基于量子卫星“墨子号”的量子测距过程仿真实验研究

doi:10.16182/j.issn1004731x.joss.19-0543

系统仿真学报 ›› 2021, Vol. 33 ›› Issue (2): 377-388.doi: 10.16182/j.issn1004731x.joss.19-0543

• 仿真支撑平台/系统技术 • 上一篇下一篇

基于量子卫星“墨子号”的量子测距过程仿真实验研究

丛爽, 段士奇

中国科学技术大学自动化系,安徽合肥 230027

收稿日期:2019-10-10 修回日期:2020-01-03 出版日期:2021-02-18 发布日期:2021-02-20
作者简介:丛爽(1961-),女,博士,教授,博导,研究方向为量子系统控制、量子导航定位系统设计等。E-mail：scong@ustc.edu.cn
基金资助:
国家自然科学基金(61973290),天地一体化信息技术国家重点实验室开放基金(2015_SGIIT_KFJJ_DH_04)

Simulation Experiment of Quantum Ranging Process Based on the “Mozi” Quantum Satellite

Cong Shuang, Duan Shiqi

Department of Automation, University of Science and Technology of China, Hefei 230027, China

Received:2019-10-10 Revised:2020-01-03 Online:2021-02-18 Published:2021-02-20

摘要/Abstract

摘要： 对星地量子测距过程中利用捕获跟踪瞄准(Acquisition tracking and pointing,ATP)系统进行纠缠光子对收发和利用符合计数原理计算纠缠光子对到达时间差(Time difference of arrival,TDOA)的两个关键过程进行了仿真实验研究。根据“墨子号”量子卫星真实的6个轨道参数,对卫星的运动轨迹以及地面用户对从卫星上发射到地面信号的ATP过程进行系统仿真实验研究。分析并设计了ATP系统的结构;借助于Simulink环境下的仿真软件,建立ATP时域仿真系统,将所计算出的“墨子号”方位角与俯仰角位置信号作为ATP系统的输入信号,对所建立的ATP系统进行星地纠缠光收发的捕获跟踪瞄准过程进行了系统仿真实验,跟踪精度达到了2 μrad;在实现地面用户对量子卫星的精确跟踪的基础上,设计并进行纠缠光子对收发及其符合计数的仿真实验;拟合出纠缠光子对皮秒级误差的到达时间差,实现了精确的量子测距过程,为量子导航系统的实现提供了一定的理论及仿真实验基础。

关键词: 量子测距, “墨子号”, 轨道仿真, ATP系统, 纠缠光子对, 符合计数

Abstract: The simulation experiment researches about two key processes of earth-satellite quantum ranging process are carried out, including the transmission and reception about the photon pairs based on the acquisition, tracking and pointing (ATP) system, and the calculation about the time difference of arrival (TDOA) of entangled photon pairs by the coincidence counting principle. Motion trajectory of the quantum satellite “Mozi” based on its six orbital parameters and the acquisition, tracking and pointing process to the optical signal from satellite to ground users are simulated. The function and structure of the acquisition tracking and pointing system are analysed, and a time domain simulation diagram of the ATP system using Simulink is given. By using the azimuth and elevation angle as the input signals of the ATP system, the ATP process are simulated, and the tracking accuracy is within 2 μrad. Based on the accurate tracking of quantum satellite by ground users, the experiments of transmission and reception of entangled photon pair are designed and carried out. Accurate TDOA values of the entangled photon pairs are fitted by coincidence counting results, which has a picosecond level fitting error. This paper provides some theoretical and simulation basis for the realization of quantum positioning system.

Key words: quantum ranging, “Mozi”, orbit simulation, ATP system, entangled photon pairs, coincidence counting

中图分类号:

丛爽, 段士奇. 基于量子卫星“墨子号”的量子测距过程仿真实验研究[J]. 系统仿真学报, 2021, 33(2): 377-388.

Cong Shuang, Duan Shiqi. Simulation Experiment of Quantum Ranging Process Based on the “Mozi” Quantum Satellite[J]. Journal of System Simulation, 2021, 33(2): 377-388.

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基于量子卫星“墨子号”的量子测距过程仿真实验研究

Simulation Experiment of Quantum Ranging Process Based on the “Mozi” Quantum Satellite

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