TY - GEN
T1 - Asynchronous Respond-Based Autonomous Time Synchronization for Low-SNR High-Dynamic Frequency Hopping System
AU - Hu, Chunxu
AU - Liu, Xin
AU - Din, Li
AU - Wu, Hao
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - High-speed unmanned aerial vehicle (UAV) cluster under frequency hopping system boasts advantages of efficiency, flexibility, reliability, and anti-interference, making it widely applicable in military, scientific research, and civilian applications. Accurate execution of tasks among communication nodes within the high-speed UAV cluster requires that the time references between nodes are consistent, and in the absence of external time reference requires the use of autonomous time synchronization to achieve time synchronization between nodes. In high-dynamic application scene of high-speed UAV clusters, time synchronization accuracy is affected by low signal-to-noise ratio (SNR) and high-dynamic Doppler frequency. Therefore, this paper proposes an asynchronous multi-hop difference-fitting algorithm. Firstly, the dynamic Doppler is estimated through the phase information in the multi-hop signal. Then the time of arrival (TOA) estimation accuracy is improved by using multi-hop joint approach. Finally, the nodes interact with each other through asynchronous respond and correct the timestamps, thus achieving high-precision time synchronization among nodes.
AB - High-speed unmanned aerial vehicle (UAV) cluster under frequency hopping system boasts advantages of efficiency, flexibility, reliability, and anti-interference, making it widely applicable in military, scientific research, and civilian applications. Accurate execution of tasks among communication nodes within the high-speed UAV cluster requires that the time references between nodes are consistent, and in the absence of external time reference requires the use of autonomous time synchronization to achieve time synchronization between nodes. In high-dynamic application scene of high-speed UAV clusters, time synchronization accuracy is affected by low signal-to-noise ratio (SNR) and high-dynamic Doppler frequency. Therefore, this paper proposes an asynchronous multi-hop difference-fitting algorithm. Firstly, the dynamic Doppler is estimated through the phase information in the multi-hop signal. Then the time of arrival (TOA) estimation accuracy is improved by using multi-hop joint approach. Finally, the nodes interact with each other through asynchronous respond and correct the timestamps, thus achieving high-precision time synchronization among nodes.
KW - Asynchronous respond
KW - Dynamic Doppler
KW - High-dynamic scenes
KW - TOA estimation
KW - Time synchronization
UR - https://www.scopus.com/pages/publications/85186099974
U2 - 10.1109/ICCT59356.2023.10419752
DO - 10.1109/ICCT59356.2023.10419752
M3 - Conference contribution
AN - SCOPUS:85186099974
T3 - International Conference on Communication Technology Proceedings, ICCT
SP - 1099
EP - 1105
BT - 2023 IEEE 23rd International Conference on Communication Technology
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 23rd IEEE International Conference on Communication Technology, ICCT 2023
Y2 - 20 October 2023 through 22 October 2023
ER -