JZUS - Journal of Zhejiang University SCIENCE

Frontiers of Information Technology & Electronic Engineering

Accepted manuscript available online (unedited version)

A novel frequency protection interval adjustment method based on Doppler frequency offset pre-compensation for space-based Internet of Things

Author(s): Qingquan LIU, Lihu CHEN, Songting LI, Yiran XIANG, Baokang ZHAO
Affiliation(s): College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China; more
Corresponding email(s): liuqq_wy2022@163.com, chenlihu05@nudt.edu.cn
Key Words: Protection interval; Spectrum utilization; Doppler frequency offset pre-compensation; Massive access users

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Qingquan LIU, Lihu CHEN, Songting LI, Yiran XIANG, Baokang ZHAO. A novel frequency protection interval adjustment method based on Doppler frequency offset pre-compensation for space-based Internet of Things[J]. Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/FITEE.2400033

@article{title="A novel frequency protection interval adjustment method based on Doppler frequency offset pre-compensation for space-based Internet of Things",
author="Qingquan LIU, Lihu CHEN, Songting LI, Yiran XIANG, Baokang ZHAO",
journal="Frontiers of Information Technology & Electronic Engineering",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/FITEE.2400033"
}

%0 Journal Article
%T A novel frequency protection interval adjustment method based on Doppler frequency offset pre-compensation for space-based Internet of Things
%A Qingquan LIU
%A Lihu CHEN
%A Songting LI
%A Yiran XIANG
%A Baokang ZHAO
%J Frontiers of Information Technology & Electronic Engineering
%P
%@ 2095-9184
%D in press
%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/FITEE.2400033"

TY - JOUR
T1 - A novel frequency protection interval adjustment method based on Doppler frequency offset pre-compensation for space-based Internet of Things
A1 - Qingquan LIU
A1 - Lihu CHEN
A1 - Songting LI
A1 - Yiran XIANG
A1 - Baokang ZHAO
J0 - Frontiers of Information Technology & Electronic Engineering
SP -
EP -
%@ 2095-9184
Y1 - in press
PB - Zhejiang University Press & Springer
ER -
doi="https://doi.org/10.1631/FITEE.2400033"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: The space-based Internet of Things (IoT) requires more frequency resources so that it becomes possible for a large number of users to access the network. However, the frequency resources that are currently available have already been allocated to a great extent. Furthermore, the utilization rate of the allocated frequency resources is low. In order to realize a greater number of users accessing the network under restricted conditions of frequency resources, this work proposes a scheme based on Doppler frequency offset (DFO) pre-compensation to improve the utilization rate of spectrum resources. By calculating the relative motion between the satellite and the transmitting terminal, combined with the length and transmission rate of the message, the optimal compensation value of the Doppler frequency deviation is determined. Realize the reduction of the frequency-protection interval. The simulation results show that the pre-compensation method can expand the user access volume by 90âĂŞ400 times. The proper selection of the pre-compensation used for calculating the number of compensations and the transmission rate can also help increase the incremental user access by an additional 45% or more. This method improves the spectrum utilization and provides a solution to the challenge of access by a large number of users.

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