TY - GEN
T1 - Energy Clustering Acquisition of OTFS in Space Communications
AU - Cheng, Qianyi
AU - Yang, Xuanhe
AU - Zhang, Jiahao
AU - Du, Jiaheng
AU - Zhang, Fukai
AU - Zhang, Rui
AU - Pan, Gaofeng
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2026.
PY - 2026
Y1 - 2026
N2 - The emergence of 6G networks demands endogenous solutions for wireless security and privacy, leveraging advanced techniques like physical-layer security, covert wireless communications, and orthogonal time frequency space (OTFS) to combat evolving threats and enable secure interconnected systems. However, OTFS needs to be reconsidered in low Earth orbit (LEO) satellite covert communications, due to the overspread Doppler squint effect (ODSE) caused by excessive accumulation time combined with high relative velocities. This paper analyses the impact of ODSE affecting more than one grid and proposes an energy-density clustering acquisition (ECA) scheme. By redefining the neighborhood structure and employing a power-centered clustering approach, the ECA scheme enhances detection probability and estimation accuracy while maintaining low computational complexity. Simulation results confirm the performance superiority compared with traditional acquisition schemes.
AB - The emergence of 6G networks demands endogenous solutions for wireless security and privacy, leveraging advanced techniques like physical-layer security, covert wireless communications, and orthogonal time frequency space (OTFS) to combat evolving threats and enable secure interconnected systems. However, OTFS needs to be reconsidered in low Earth orbit (LEO) satellite covert communications, due to the overspread Doppler squint effect (ODSE) caused by excessive accumulation time combined with high relative velocities. This paper analyses the impact of ODSE affecting more than one grid and proposes an energy-density clustering acquisition (ECA) scheme. By redefining the neighborhood structure and employing a power-centered clustering approach, the ECA scheme enhances detection probability and estimation accuracy while maintaining low computational complexity. Simulation results confirm the performance superiority compared with traditional acquisition schemes.
KW - Doppler Squint Effect
KW - LEO Communications
KW - OTFS
UR - https://www.scopus.com/pages/publications/105039600501
U2 - 10.1007/978-981-95-6853-6_21
DO - 10.1007/978-981-95-6853-6_21
M3 - Conference contribution
AN - SCOPUS:105039600501
SN - 9789819568529
T3 - Lecture Notes in Electrical Engineering
SP - 206
EP - 215
BT - Proceedings of the 4th International Conference on Internet of Things, Communication and Intelligent Technology - IoT and Communication
A2 - Dong, Jian
A2 - Zheng, Tongxing
PB - Springer Science and Business Media Deutschland GmbH
T2 - 4th International Conference on Internet of Things, Communication and Intelligent Technology, IoTCIT 2025
Y2 - 27 June 2025 through 29 June 2025
ER -