Chinese Journal of Quantum Electronics, Volume. 41, Issue 6, 933(2024)
Time synchronization method for quantum communication based on time⁃frequency domain
Figures & Tables(8)
Fig. 2. The time distribution of the quantum light. The synchronization accuracy is 0.312 ns, the half-height width is 0.7 ns
Fig. 4. Periodic recovery data of quantum light received by the receiver
Fig. 5. Time distribution of the quantum light recovered by the algorithm of LTS. The synchronization accuracy is 1.03 ns, the half-height width is 1.4 ns
Fig. 6. Time distribution of the quantum light recovered by the algorithm of least squares method. The synchronization accuracy is 1.29 ns, the half-height width is 1.9 ns
Table 1. Parameter setting of simulation data
View tableView in ArticleTable 1. Parameter setting of simulation data
Name Parameter setting Number of quantum light 1000000 Link loss/dB 30-50 Period of quantum light/ns 10 Clock skew/ns 0.0005 Measurement error/ps 300
Table 2. Experimental results of different algorithms
View tableView in ArticleTable 2. Experimental results of different algorithms
Name Maximum number of quantum light Synchronization accuracy/ns The half-height width/ns Algorithm of LTS 605 1.03 1.4 Algorithm of least squares method 528 1.29 1.9 Algorithm of DFT 320 1.38 3.5
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Wei SHEN, Weiyue LIU. Time synchronization method for quantum communication based on time⁃frequency domain[J]. Chinese Journal of Quantum Electronics, 2024, 41(6): 933
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Received: Dec. 5, 2022
Accepted: --
Published Online: Jan. 8, 2025
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