量子定位系统中符合计数与到达时间差的获取

丛爽; 宋媛媛

doi:10.13700/j.bh.1001-5965.2019.0540

量子定位系统中符合计数与到达时间差的获取

doi: 10.13700/j.bh.1001-5965.2019.0540

丛爽^,,
宋媛媛

中国科学技术大学自动化系, 合肥 230027

基金项目:

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

详细信息

作者简介:
丛爽女，博士，教授，博士生导师。主要研究方向：运动控制、智能控制和量子系统控制理论及其在量子导航定位系统中应用

通讯作者:
丛爽. E-mail:scong@ustc.edu.cn

中图分类号: V249.32⁺9;V474.2⁺5;TN965
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- 被引次数: 0
出版历程
- 收稿日期: 2019-10-12
- 录用日期: 2019-12-16
- 网络出版日期: 2020-10-20

Coincidence counting and acquisition of the time difference of arrival in quantum positioning systems

CONG Shuang^,,
SONG Yuanyuan

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

Funds:

National Natural Science Foundation of China 61973290

Open Research Fund of State Key Laboratory of Space-Ground Integrated Information Technology 2015_SGIIT_KFJJ_DH_04

More Information

Corresponding author: CONG Shuang. E-mail:scong@ustc.edu.cn

摘要

摘要:
基于MATLAB图形用户界面接口（GUI），采用软件设计方式，实现量子纠缠光信号的采集，以及对采集到的两路量子纠缠光信号的符合算法。通过对符合算法中不同的符合门宽、采集时间和延时增加步长3个重要参数的性能实验，优化和确定各参数的选值。通过对量子纠缠光符合计数与到达时间差（TDOA）的研究，完成地面数据获取与信息处理模块的设计与实现。设计并实现了时间差拟合的仿真平台。实验结果达到了期望的精度和效率的需求。
- 自发参量下转换 /
- 量子纠缠光 /
- 到达时间差(TDOA) /
- 符合计数 /
- 曲线拟合
Abstract:
Based on the Graphic User Interface (GUI) in MATLAB, the software is designed to realize the acquisition of quantum entangled light signals and the coincidence algorithm of the two entangled photon signals collected. At the same time, the selection of each parameter is optimized and determined by performance experiments on three important parameters including the coincidence gate width, the acquisition time and the delay increasing step in the coincidence algorithm. The design and implementation of the ground data acquisition and information processing module is completed by studying coincidence counting and Time Difference of Arrival (TDOA) based on quantum entangled light. Finally, the simulation platform of TDOA fitting is designed and implemented. The experimental results meet the desired accuracy and efficiency requirements.
- spontaneous parameter down conversion /
- quantum entangled light /
- Time Difference of Arrival (TDOA) /
- coincidence counting /
- curve fitting

HTML全文

图 1 量子纠缠光信号的获取与测量过程

Figure 1. Acquisition and measurement process of quantum entangled light signals

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图 2 二阶关联函数

Figure 2. Second-order correlation function

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图 3 符合测量单元中软件算法的流程

Figure 3. Flowchart of software algorithm in coincidence measurement unit

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图 4 符合计数示意图

Figure 4. Schematic diagram of coincidence counting

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图 5 一次符合计数的流程

Figure 5. Flowchart of one coincidence counting

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图 6 符合门宽对二阶关联函数的影响

Figure 6. Influence of coincidence gate width on second-order correlation function

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图 7 采集时间对二阶关联函数的影响

Figure 7. Influence of acquisition time on second-order correlation function

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图 8 延时增加步长对二阶关联函数的影响

Figure 8. Influence of delay increasing step on second-order correlation function

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图 9 纠缠光子源的产生与接收及时间差拟合结果的GUI设计

Figure 9. GUI design of generating and receiving entangled photon sources and fitting time difference results

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表 1 不同符合门宽对应的延时值

Table 1. Delay values corresponding to differentcoincidence gate widths

实验编号	δ/ns	Δt_a/ns
1	0.05	0.521
2	0.2	0.522
3	0.4	0.527

下载: 导出CSV

表 2 不同采集时间对应的延时值

Table 2. Delay values corresponding to different acquisition time

实验编号	T/ms	Δt_a/ns
1	1	0.522
2	10	0.523
3	50	0.523

下载: 导出CSV

表 3 不同延时增加步长对应的延时值

Table 3. Delay values corresponding to different delay increasing steps

实验编号	s/ns	Δt_a/ns
1	0.02	0.523
2	0.01	0.524
3	0.002	0.524

下载: 导出CSV

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