中国空间科学技术（中英文）2026，Vol.46Issue(3)：205-214,10.DOI:10.16708/j.cnki.1000-758X.2026.0047
透明转发架构IoT NTN卫星通信系统频偏影响分析
Analysis of frequency offset impact on IoT NTN satellite communication system with transparent forwarding architecture
陈毅君 1丁晟 1高向东 1孟维晓2
作者信息
- 1. 浙江时空道宇科技有限公司,上海 200233
- 2. 哈尔滨工业大学电子与信息工程学院,哈尔滨 150006
- 折叠
摘要
Abstract
The IoT NTN(Internet of Things Non-Terrestrial Network)satellite communication system,based on a transparent forwarding architecture,utilizes Orthogonal Frequency Division Multiple Access(OFDMA)technology.While effective,its performance is significantly sensitive to frequency offset.Currently,engineering practice lacks robust analytical tools to evaluate these effects.To provide a practical frequency offset analysis method for transparent IoT NTN systems,this paper proposes a frequency offset analysis model and offers design recommendations for related performance indicators.Focusing on the limited frequency offset tolerance of the return link,the system's operational limits were determined through rigorous simulation analysis and experimental testing.The study identifies ephemeris errors and clock frequency errors as the primary factors degrading system performance.Results indicate that the return link frequency offset should be maintained below 200Hz.To ensure compliance with this threshold,the following specifications are proposed:the ephemeris error should be kept within 20m,the ground segment clock frequency accuracy should not exceed 3ppb,and the space segment clock frequency accuracy should not exceed 10ppb.Beyond its application to transparent IoT NTN architecture,the research methodology presented here can be extended to the design of frequency offset indicators for broader communication systems,providing a valuable reference for engineering implementation.关键词
IoT NTN/卫星通信系统/透明转发/频偏/星历/时钟Key words
IoT NTN/satellite communication system/transparent forwarding/frequency error/ephemeris/clock分类
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陈毅君,丁晟,高向东,孟维晓..透明转发架构IoT NTN卫星通信系统频偏影响分析[J].中国空间科学技术（中英文）,2026,46(3):205-214,10.
