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Qubit-Based synchronization algorithm for Measurement-Device-Independent Quantum Key Distribution

JOURNAL OF LIGHTWAVE TECHNOLOGY 2025年第7期43卷 3041-3050页

作者： Huang, Zheng-Kai Li, Jia-Xuan Lu, Feng-Yu Wang, Ze-Hao Wang, Shuang Yin, Zhen-Qiang He, De-Yong Chen, Wei Guo, Guang-Can Han, Zheng-Fu Univ Sci & Technol China CAS Key Lab Quantum Informat Hefei 230026 Peoples R China Univ Sci & Technol China CAS Ctr Excellence Quantum Informat & Quantum Phys Hefei 230026 Peoples R China Univ Sci & Technol China Hefei Natl Lab Hefei 230088 Peoples R China

Measurement-device-independent quantum key distribution (MDI-QKD) is considered one of the most promising protocols due to its high performance and security. To implement the MDI-QKD system in practice, clock synchronization is a crucial step to correctly generate the secret keys. However, as practical applications advance, the complexity and cost of synchronization have become significant challenges for the implementation of MDI-QKD. In this study, we introduce a qubit-based synchronization algorithm specifically designed for MDI-QKD. By utilizing the property of Hong-Ou-Mandel interference, we achieve clock synchronization between parties of MDI-QKD without the need for additional hardware. The cost-effectiveness and simplicity of this approach are expected to significantly facilitate the practical deployment of MDI-QKD.

关键词： synchronization Clocks Qubit Interference Protocols Delays Time-frequency analysis Detectors Costs Simulation Clock synchronization measurement-device-independent quantum key distribution synchronization algorithm

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synchronization algorithm for a Satellite Communication Signals Demodulator in High Carrier Shift Conditions

Synchronization Algorithm for a Satellite Communication Sign...

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Systems of Signals Generating and Processing in the Field of on Board Communications Conference

作者： Zhuravlev, A. P. Moscow Tech Univ Commun & Informat Moscow Russia

ISBN: (纸本)9781728106069

This paper discusses radio interfaces in satellite communications with phase types of modulation and framed signal structure. It outlines several different frequency-time synchronization algorithms of demodulator, specifies the features and conditions for their use. As a result it describes combined synchronization algorithm, which is able to work effectively in conditions of high and variable carrier frequency shift values.

关键词： satellite communications synchronization algorithm demodulation frequency estimation

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A New synchronization algorithm for VHDL—AMS Simulation

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Journal of Computer Science & Technology 2002年第1期17卷 28-37页

作者：肖立伊叶以正李滨 Microelectronics Center Harbin Institute of Technology P.O. Box 313 Harbin 150001 P.R. China

VHDL-AMS is the Analog and Mixed-Signal Extensions to VHDL. The paper gives a brief overview of the added features to VHDL. A mixed-signal simulator has been developed based on VHDL-AMS. A new synchronization algorithm is adopted in the simulator. Using the new algorithm the analog kernel does not need to synchronize the digital kernel at each digital event time point. The efficiency of the new synchronization algorithm is tested by examples. Simulation results show the newly developed algorithm can speed up the simulation.

关键词： synchronization algorithm mixed-signal simulation VHDL-AMS

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synchronization algorithm and FPGA implementation for Transmit-Reference UWB receiver

Synchronization algorithm and FPGA implementation for Transm...

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4th International Conference on Communications and Electronics (ICCE)

作者： Hai Viet Nguyen Manh Hoang Tran Hanoi Univ Sci & Technol Sch Elect & Commun EDA Grp Hanoi Vietnam

ISBN: (纸本)9781467324939

This paper proposes a practical synchronization algorithm for Transmit-Reference UWB receiver which uses sliding window and supports flexible sampling rates. Additionally, a Simulink model and implementation of synchronization algorithm in receiver by hardware description language (HDL) is also developed using model-based design. Finally, we assess impact of signal-noise-rate (SNR), number of bits quantization and sampling rate on bit-error-rate (BER).

关键词： Transmitted-Reference Ultra-Wideband model-based design synchronization algorithm

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Research and implementation of time synchronization algorithm based on frequency adjustment in distributed system

Research and implementation of time synchronization algorith...

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IEEE International Conference on Automation and Logistics

作者： He, Peng Zhao, Bin Wang, Biqing Yi, Na Gorges Univ Ctr Informat Technol Yichang Hubei Peoples R China Gorges Univ Coll Elect & Informat Yichan Hubei Peoples R China

ISBN: (纸本)9781424415304

Time synchronization is one of core technologies in Distributed Systems and Communication Fields. The "Network Time Protocol" (NTP) is the current widely accepted standard for synchronizing clocks over the Internet. NTP uses a hierarchical scheme in order to synchronize the clocks in the network. It mainly adopts a phase-locked loop technique to adjust the local clock. This paper develops a time synchronization algorithm based on frequency adjustment in distributed system, which has a better performance compared with current algorithm, which uses the method of phase adjusting time. Under the same accuracy requirement, the algorithm has much less time requests to the NTP server and higher stability in performance, which decreases a lot on the load of server. This algorithm is more effective and would have preferable value in application.

关键词： NTP frequency adjustment distributed system synchronization algorithm

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Characteristic Analysis and Fast Adaptive synchronization algorithm of GPS CNAV-2 Navigation Message synchronization Code

Characteristic Analysis and Fast Adaptive Synchronization Al...

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5th China Satellite Navigation Conference (CSNC)

作者： Deng, Zhong-liang Li, Jie-qiang Li, Chang-ming Yin, Lu Xi, Yue Beijing Univ Posts & Telecommun Beijing 100876 Peoples R China

ISBN: (纸本)9783642547379;9783642547362

In the navigation data processing, the speed and accuracy of the frame synchronization processing plays an important role in system efficiency and signal analysis. Unlike other navigation message which synchronized using a fixed sequence, In GPS L1C CNAV-2 navigation message, and the synchronization code uses the BCH (51, 8) code based TOI (Time of Interval) and is no longer fixed binary sequence. The TOI, in GPS L1C CNAV-2 navigation message, is the 18 s count value in every 2 h while indicated by ITOW (Interval Time of Week) and cyclically changes between 0 and 399. Thus, the BCH coding generated by the TOI is circular. Thus, the synchronization algorithm used in fixed binary sequence does not work anymore. Beside, circularity makes us have to count maximum correlation in the two adjacent frames simultaneously and traversal 256 pairs of sequences at last in each detection, which influence the speed of the frame detection and the real timeliness of receiver. To solve this problem, beginning with the shift registers which generate synchronized code of GPS L1C CNAV-2 navigation message, this paper analysis the three characteristics of the loop resistance, autocorrelation, and cross-correlation. Then, the paper designs the fast adaptive synchronization algorithm for GPS L1C CNAV-2 navigation message. In this synchronization algorithm, the first step is estimating the number of error bit in the front nine bit of 52 bit, an integral BCH coding. Then, filter and sort these possible pairs of sequences. When we count the maximum correlation in the two adjacent frames simultaneously, the pairs of sequences is detected based on the priority order. Thus, the fast adaptive synchronization algorithm makes the fast synchronization and low rate of false synchronization in different signal conditions.

关键词： GPS L1C synchronization codes characteristics Adaptive synchronization algorithm

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A multiplayer MR application based on adaptive synchronization algorithm 7

A multiplayer MR application based on adaptive synchronizati...

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7th International Conference on Control, Decision and Information Technologies (CoDIT)

作者： Zhang, Xi Hu, Youmin Huan, Tao Huazhong Univ Sci & Technol Sch Mech Sci & Engn Wuhan Peoples R China

ISBN: (纸本)9781728159539

With the popularity of virtual reality technology, it's application in the field of engineering educational and training has gradually increased. This article introduces a multiplayer mixed reality (MR) application that supports remote participants to operate engineering equipment and learn operation process in the shared virtual environment, and it explores the impact of network factors on user experience. According to the characteristics of the application, it proposes a corresponding adaptive strategy based on an existing synchronization algorithm, meantime, a comprehensive evaluation method is proposed.

关键词： Multiplayer MR application synchronization algorithm latency

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Reseach of Time synchronization algorithm based on IEEE1588 in Electric Power System

Reseach of Time Synchronization Algorithm based on IEEE1588 ...

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International Conference on Control Engineering and Communication Technology (ICCECT)

作者： Zhao, Bin Ji, Jie Zhang, Min Zhai, Peng Univ Jining Dept Comp Sci Qufu Peoples R China Jining Vocat Technol Coll Jining Peoples R China

ISBN: (纸本)9781467344999;9780769548814

For the high accuracy synchronization requirement of IEC61850 based digital substation, to apply a combination of time synchronization scheme to Substation Automation System (SAS), PTP(pricision time synchronization protocol) is adopted between bay level and process level equipment;the paper presents a method of combination of adjusted frequency and adjusted phase to achieve precision synchronization based on principle of PTP. The result of the experiment shows the algorithm is more effective.

关键词： IEEE1588 time synchronization IEC61850 synchronization algorithm

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Adaptation of the Frame synchronization algorithm of the Second Generation Satellite Broadcasting Standard DVB-S2 for Communication System 22nd

Adaptation of the Frame Synchronization Algorithm of the Sec...

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22nd International Conference on Distributed Computer and Communication Networks (DCCN)

作者： Antiufrieva, Liubov Ivchenko, Aleksandr Natl Res Univ Moscow Inst Phys & Technol Moscow Russia

ISBN: (纸本)9783030366254;9783030366247

The possibility of adapting the frame synchronization algorithm of second generation satellite broadcasting standard DVB-S2 for communication system is considered. The issue of frame synchronization is being studied in conditions when the base station determines the parameters of the physical layer and the time and frequency slot. Frame synchronization algorithms used in DVB-S2 are analyzed. An adaptation of the frame synchronization algorithm for communication system that solves the problem of frame synchronization from the first frame is proposed.

关键词： Communication system Broadcasting system Satellite communication Satellite modem DVB-S2 Physical layer frame synchronization algorithm Frame synchronization

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Study and Implementation of synchronization algorithm in Three Phase Grid Connected PV System 3

Study and Implementation of Synchronization Algorithm in Thr...

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3rd IEEE International Conference on Recent Advances in Information Technology (RAIT)

作者： Naick, B. K. Das, Manisha Chatterjee, T. K. Chatterjee, K. Indian Sch Mines Dept Elect Engn Dhanbad Bihar India

ISBN: (纸本)9781479985791

This paper presents the study and simulation of synchronization algorithm for a three phase grid connected photovoltaic (PV) system. The synchronization algorithm employs synchronous reference frame based phase locked loop with a positive sequence detection. As compared to other methods, this algorithm provides a higher degree of immunity and insensitivity to noise and harmonic distortions. The maximum efficiency of the system may be achieved by overcoming the voltage unbalances and frequency distortion using this algorithm. The synchronization algorithm is studied by using a three phase parallel, 6 kilowatt load connected to three phase grid connected photovoltaic system.

关键词： photovoltaic system synchronization algorithm phase locked loop controller

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